Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5965717 | Organic pigments from twisted benzidines | Harold S. Freeman, David Hinks | 1999-10-12 |
| 5677434 | Iron-complexed formazan dyes for polyamide and protein substrates | Harold S. Freeman, Abraham Reife | 1997-10-14 |