EXHIBIT 24.1 POWER OF ATTORNEY OFFICERS AND DIRECTORS OF NEOPROBE CORPORATION The undersigned who is a director or officer of Neoprobe Corporation, a Delaware corporation (the "Company"); Does hereby constitute and appoint John L. Ridihalgh and David C. Bupp to be his agents and attorneys-in-fact; Each with the power to act fully hereunder without the other and with full power of substitution to act in the name and on behalf of the undersigned; To sign and file with the Securities and Exchange Commission one or more Registration Statements on Form S-3 under the Securities Act of 1933 and any amendments or supplements (including post-effective amendments) to such Registration Statements; and To execute and deliver any instruments, certificates or other documents which they shall deem necessary or proper in connection with the filing of such Registration Statements, and generally to act for and in the name of the undersigned with respect to such filings as fully as could the undersigned if then personally present and acting. Each agent named above is hereby empowered to determine in his discretion the times when, the purposes for, and the names in which, any power conferred upon him herein shall be exercised and the terms and conditions of any instrument, certificate or document which may be executed by him pursuant to this instrument. This Power of Attorney shall not be affected by the disability of the undersigned or the lapse of time. The validity, terms and enforcement of this Power of Attorney shall be governed by those laws of the State of Ohio that apply to instruments negotiated, executed, delivered and performed solely within the State of Ohio. This Power of Attorney may be executed in any number of counterparts, each of which shall have the same effect as if it were the original instrument and all of which shall constitute one and the same instrument. IN WITNESS WHEREOF, I have executed this Power of Attorney this 10th day of June, 1996. ---- /s/ John L. Ridihalgh --------------------- John L. Ridihalgh EXHIBIT 24.1 POWER OF ATTORNEY OFFICERS AND DIRECTORS OF NEOPROBE CORPORATION The undersigned who is a director or officer of Neoprobe Corporation, a Delaware corporation (the "Company"); Does hereby constitute and appoint John L. Ridihalgh and David C. Bupp to be his agents and attorneys-in-fact; Each with the power to act fully hereunder without the other and with full power of substitution to act in the name and on behalf of the undersigned; To sign and file with the Securities and Exchange Commission one or more Registration Statements on Form S-3 under the Securities Act of 1933 and any amendments or supplements (including post-effective amendments) to such Registration Statements; and To execute and deliver any instruments, certificates or other documents which they shall deem necessary or proper in connection with the filing of such Registration Statements, and generally to act for and in the name of the undersigned with respect to such filings as fully as could the undersigned if then personally present and acting. Each agent named above is hereby empowered to determine in his discretion the times when, the purposes for, and the names in which, any power conferred upon him herein shall be exercised and the terms and conditions of any instrument, certificate or document which may be executed by him pursuant to this instrument. This Power of Attorney shall not be affected by the disability of the undersigned or the lapse of time. The validity, terms and enforcement of this Power of Attorney shall be governed by those laws of the State of Ohio that apply to instruments negotiated, executed, delivered and performed solely within the State of Ohio. This Power of Attorney may be executed in any number of counterparts, each of which shall have the same effect as if it were the original instrument and all of which shall constitute one and the same instrument. IN WITNESS WHEREOF, I have executed this Power of Attorney this 10th day of June, 1996. ---- /s/ David C. Bupp ----------------- David C. Bupp EXHIBIT 24.1 POWER OF ATTORNEY OFFICERS AND DIRECTORS OF NEOPROBE CORPORATION The undersigned who is a director or officer of Neoprobe Corporation, a Delaware corporation (the "Company"); Does hereby constitute and appoint John L. Ridihalgh and David C. Bupp to be his agents and attorneys-in-fact; Each with the power to act fully hereunder without the other and with full power of substitution to act in the name and on behalf of the undersigned; To sign and file with the Securities and Exchange Commission one or more Registration Statements on Form S-3 under the Securities Act of 1933 and any amendments or supplements (including post-effective amendments) to such Registration Statements; and To execute and deliver any instruments, certificates or other documents which they shall deem necessary or proper in connection with the filing of such Registration Statements, and generally to act for and in the name of the undersigned with respect to such filings as fully as could the undersigned if then personally present and acting. Each agent named above is hereby empowered to determine in his discretion the times when, the purposes for, and the names in which, any power conferred upon him herein shall be exercised and the terms and conditions of any instrument, certificate or document which may be executed by him pursuant to this instrument. This Power of Attorney shall not be affected by the disability of the undersigned or the lapse of time. The validity, terms and enforcement of this Power of Attorney shall be governed by those laws of the State of Ohio that apply to instruments negotiated, executed, delivered and performed solely within the State of Ohio. This Power of Attorney may be executed in any number of counterparts, each of which shall have the same effect as if it were the original instrument and all of which shall constitute one and the same instrument. IN WITNESS WHEREOF, I have executed this Power of Attorney this 10th day of June, 1996. ---- /s/ John Schroepfer ------------------- John Schroepfer EXHIBIT 24.1 POWER OF ATTORNEY OFFICERS AND DIRECTORS OF NEOPROBE CORPORATION The undersigned who is a director or officer of Neoprobe Corporation, a Delaware corporation (the "Company"); Does hereby constitute and appoint John L. Ridihalgh and David C. Bupp to be his agents and attorneys-in-fact; Each with the power to act fully hereunder without the other and with full power of substitution to act in the name and on behalf of the undersigned; To sign and file with the Securities and Exchange Commission one or more Registration Statements on Form S-3 under the Securities Act of 1933 and any amendments or supplements (including post-effective amendments) to such Registration Statements; and To execute and deliver any instruments, certificates or other documents which they shall deem necessary or proper in connection with the filing of such Registration Statements, and generally to act for and in the name of the undersigned with respect to such filings as fully as could the undersigned if then personally present and acting. Each agent named above is hereby empowered to determine in his discretion the times when, the purposes for, and the names in which, any power conferred upon him herein shall be exercised and the terms and conditions of any instrument, certificate or document which may be executed by him pursuant to this instrument. This Power of Attorney shall not be affected by the disability of the undersigned or the lapse of time. The validity, terms and enforcement of this Power of Attorney shall be governed by those laws of the State of Ohio that apply to instruments negotiated, executed, delivered and performed solely within the State of Ohio. This Power of Attorney may be executed in any number of counterparts, each of which shall have the same effect as if it were the original instrument and all of which shall constitute one and the same instrument. IN WITNESS WHEREOF, I have executed this Power of Attorney this 10th day of June, 1996. ---- /s/ C. Michael Hazard --------------------- C. Michael Hazard EXHIBIT 24.1 POWER OF ATTORNEY OFFICERS AND DIRECTORS OF NEOPROBE CORPORATION The undersigned who is a director or officer of Neoprobe Corporation, a Delaware corporation (the "Company"); Does hereby constitute and appoint John L. Ridihalgh and David C. Bupp to be his agents and attorneys-in-fact; Each with the power to act fully hereunder without the other and with full power of substitution to act in the name and on behalf of the undersigned; To sign and file with the Securities and Exchange Commission one or more Registration Statements on Form S-3 under the Securities Act of 1933 and any amendments or supplements (including post-effective amendments) to such Registration Statements; and To execute and deliver any instruments, certificates or other documents which they shall deem necessary or proper in connection with the filing of such Registration Statements, and generally to act for and in the name of the undersigned with respect to such filings as fully as could the undersigned if then personally present and acting. Each agent named above is hereby empowered to determine in his discretion the times when, the purposes for, and the names in which, any power conferred upon him herein shall be exercised and the terms and conditions of any instrument, certificate or document which may be executed by him pursuant to this instrument. This Power of Attorney shall not be affected by the disability of the undersigned or the lapse of time. The validity, terms and enforcement of this Power of Attorney shall be governed by those laws of the State of Ohio that apply to instruments negotiated, executed, delivered and performed solely within the State of Ohio. This Power of Attorney may be executed in any number of counterparts, each of which shall have the same effect as if it were the original instrument and all of which shall constitute one and the same instrument. IN WITNESS WHEREOF, I have executed this Power of Attorney this 11 day of June, 1996. -- /s/ Julius R. Krevans --------------------- Julius R. Krevans EXHIBIT 24.1 POWER OF ATTORNEY OFFICERS AND DIRECTORS OF NEOPROBE CORPORATION The undersigned who is a director or officer of Neoprobe Corporation, a Delaware corporation (the "Company"); Does hereby constitute and appoint John L. Ridihalgh and David C. Bupp to be his agents and attorneys-in-fact; Each with the power to act fully hereunder without the other and with full power of substitution to act in the name and on behalf of the undersigned; To sign and file with the Securities and Exchange Commission one or more Registration Statements on Form S-3 under the Securities Act of 1933 and any amendments or supplements (including post-effective amendments) to such Registration Statements; and To execute and deliver any instruments, certificates or other documents which they shall deem necessary or proper in connection with the filing of such Registration Statements, and generally to act for and in the name of the undersigned with respect to such filings as fully as could the undersigned if then personally present and acting. Each agent named above is hereby empowered to determine in his discretion the times when, the purposes for, and the names in which, any power conferred upon him herein shall be exercised and the terms and conditions of any instrument, certificate or document which may be executed by him pursuant to this instrument. This Power of Attorney shall not be affected by the disability of the undersigned or the lapse of time. The validity, terms and enforcement of this Power of Attorney shall be governed by those laws of the State of Ohio that apply to instruments negotiated, executed, delivered and performed solely within the State of Ohio. This Power of Attorney may be executed in any number of counterparts, each of which shall have the same effect as if it were the original instrument and all of which shall constitute one and the same instrument. IN WITNESS WHEREOF, I have executed this Power of Attorney this 10 day of June, 1996. -- /s/ Michael P. Moore -------------------- Michael P. Moore EXHIBIT 24.1 POWER OF ATTORNEY OFFICERS AND DIRECTORS OF NEOPROBE CORPORATION The undersigned who is a director or officer of Neoprobe Corporation, a Delaware corporation (the "Company"); Does hereby constitute and appoint John L. Ridihalgh and David C. Bupp to be his agents and attorneys-in-fact; Each with the power to act fully hereunder without the other and with full power of substitution to act in the name and on behalf of the undersigned; To sign and file with the Securities and Exchange Commission one or more Registration Statements on Form S-3 under the Securities Act of 1933 and any amendments or supplements (including post-effective amendments) to such Registration Statements; and To execute and deliver any instruments, certificates or other documents which they shall deem necessary or proper in connection with the filing of such Registration Statements, and generally to act for and in the name of the undersigned with respect to such filings as fully as could the undersigned if then personally present and acting. Each agent named above is hereby empowered to determine in his discretion the times when, the purposes for, and the names in which, any power conferred upon him herein shall be exercised and the terms and conditions of any instrument, certificate or document which may be executed by him pursuant to this instrument. This Power of Attorney shall not be affected by the disability of the undersigned or the lapse of time. The validity, terms and enforcement of this Power of Attorney shall be governed by those laws of the State of Ohio that apply to instruments negotiated, executed, delivered and performed solely within the State of Ohio. This Power of Attorney may be executed in any number of counterparts, each of which shall have the same effect as if it were the original instrument and all of which shall constitute one and the same instrument. IN WITNESS WHEREOF, I have executed this Power of Attorney this 10th day of June, 1996. ---- /s/ Zwi Vromen -------------- Zwi Vromen EXHIBIT 24.1 POWER OF ATTORNEY OFFICERS AND DIRECTORS OF NEOPROBE CORPORATION The undersigned who is a director or officer of Neoprobe Corporation, a Delaware corporation (the "Company"); Does hereby constitute and appoint John L. Ridihalgh and David C. Bupp to be his agents and attorneys-in-fact; Each with the power to act fully hereunder without the other and with full power of substitution to act in the name and on behalf of the undersigned; To sign and file with the Securities and Exchange Commission one or more Registration Statements on Form S-3 under the Securities Act of 1933 and any amendments or supplements (including post-effective amendments) to such Registration Statements; and To execute and deliver any instruments, certificates or other documents which they shall deem necessary or proper in connection with the filing of such Registration Statements, and generally to act for and in the name of the undersigned with respect to such filings as fully as could the undersigned if then personally present and acting. Each agent named above is hereby empowered to determine in his discretion the times when, the purposes for, and the names in which, any power conferred upon him herein shall be exercised and the terms and conditions of any instrument, certificate or document which may be executed by him pursuant to this instrument. This Power of Attorney shall not be affected by the disability of the undersigned or the lapse of time. The validity, terms and enforcement of this Power of Attorney shall be governed by those laws of the State of Ohio that apply to instruments negotiated, executed, delivered and performed solely within the State of Ohio. This Power of Attorney may be executed in any number of counterparts, each of which shall have the same effect as if it were the original instrument and all of which shall constitute one and the same instrument. IN WITNESS WHEREOF, I have executed this Power of Attorney this 10th day of June, 1996. ---- /s/ Jerry K. Mueller, Jr. ------------------------- Jerry K. Mueller, Jr. EXHIBIT 24.1 POWER OF ATTORNEY OFFICERS AND DIRECTORS OF NEOPROBE CORPORATION The undersigned who is a director or officer of Neoprobe Corporation, a Delaware corporation (the "Company"); Does hereby constitute and appoint John L. Ridihalgh and David C. Bupp to be his agents and attorneys-in-fact; Each with the power to act fully hereunder without the other and with full power of substitution to act in the name and on behalf of the undersigned; To sign and file with the Securities and Exchange Commission one or more Registration Statements on Form S-3 under the Securities Act of 1933 and any amendments or supplements (including post-effective amendments) to such Registration Statements; and To execute and deliver any instruments, certificates or other documents which they shall deem necessary or proper in connection with the filing of such Registration Statements, and generally to act for and in the name of the undersigned with respect to such filings as fully as could the undersigned if then personally present and acting. Each agent named above is hereby empowered to determine in his discretion the times when, the purposes for, and the names in which, any power conferred upon him herein shall be exercised and the terms and conditions of any instrument, certificate or document which may be executed by him pursuant to this instrument. This Power of Attorney shall not be affected by the disability of the undersigned or the lapse of time. The validity, terms and enforcement of this Power of Attorney shall be governed by those laws of the State of Ohio that apply to instruments negotiated, executed, delivered and performed solely within the State of Ohio. This Power of Attorney may be executed in any number of counterparts, each of which shall have the same effect as if it were the original instrument and all of which shall constitute one and the same instrument. IN WITNESS WHEREOF, I have executed this Power of Attorney this 10th day of June, 1996. ---- /s/ J. Frank Whitley, Jr. ------------------------- J. Frank Whitley, Jr. EXHIBIT 24.1 POWER OF ATTORNEY OFFICERS AND DIRECTORS OF NEOPROBE CORPORATION The undersigned who is a director or officer of Neoprobe Corporation, a Delaware corporation (the "Company"); Does hereby constitute and appoint John L. Ridihalgh and David C. Bupp to be his agents and attorneys-in-fact; Each with the power to act fully hereunder without the other and with full power of substitution to act in the name and on behalf of the undersigned; To sign and file with the Securities and Exchange Commission one or more Registration Statements on Form S-3 under the Securities Act of 1933 and any amendments or supplements (including post-effective amendments) to such Registration Statements; and To execute and deliver any instruments, certificates or other documents which they shall deem necessary or proper in connection with the filing of such Registration Statements, and generally to act for and in the name of the undersigned with respect to such filings as fully as could the undersigned if then personally present and acting. Each agent named above is hereby empowered to determine in his discretion the times when, the purposes for, and the names in which, any power conferred upon him herein shall be exercised and the terms and conditions of any instrument, certificate or document which may be executed by him pursuant to this instrument. This Power of Attorney shall not be affected by the disability of the undersigned or the lapse of time. The validity, terms and enforcement of this Power of Attorney shall be governed by those laws of the State of Ohio that apply to instruments negotiated, executed, delivered and performed solely within the State of Ohio. This Power of Attorney may be executed in any number of counterparts, each of which shall have the same effect as if it were the original instrument and all of which shall constitute one and the same instrument. IN WITNESS WHEREOF, I have executed this Power of Attorney this 10th day of June, 1996. ---- /s/ James F. Zid ---------------- James F. Zid