Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5144495 | Systems for illuminating and evaluating surfaces | James R. Diefenthal, William D. Radigan, Soumitra Sengupta, Emmett J. Lenaz, Jr. | 1992-09-01 |
| 5133019 | Systems and methods for illuminating and evaluating surfaces | James R. Diefenthal, William D. Radigan, Soumitra Sengupta, Emmett J. Lenaz, Jr. | 1992-07-21 |
| 4899392 | Method and system for objectively grading and identifying coins | — | 1990-02-06 |