Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5776871 | Shampoos with insoluble silicone conditioning agent and cationic polymer | Philip E. Cothran, Timothy Woodrow Coffindaffer | 1998-07-07 |
| 5624666 | Anti-dandruff shampoos with particulate active agent and cationic polymer | Timothy Woodrow Coffindaffer, Philip E. Cothran | 1997-04-29 |
| D331710 | Engine timing light | Donald C. McKinnon, Duke Larsen | 1992-12-15 |
| 5023764 | Stroboscopic lamp optical system | Donald C. McKinnon | 1991-06-11 |