Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4208119 | Photographic film developer | Harry Arthur Hele Spence-Bate | 1980-06-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4208119 | Photographic film developer | Harry Arthur Hele Spence-Bate | 1980-06-17 |