Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5618658 | Process for producing an ammonium thiosulfate product | Malcolm S. Penman, Peter R. Wardle | 1997-04-08 |
| 4882264 | Color developer composition | Hongzoon Kim, Harris R. Miller | 1989-11-21 |