Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847383 | Photographic reagent tetrazoles | James R. Bartels-Keith, Roger A. Boggs, Anthony J. Puttick | 1989-07-11 |
| 4503139 | Photographic products and processes and novel compounds | James R. Bartels-Keith, Roger A. Boggs, Anthony J. Puttick | 1985-03-05 |