Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7955260 | Method for rating severity of psoriasis | — | 2011-06-07 |
| 6661890 | Apparatus for prestored bypass dialing | — | 2003-12-09 |
| 6017960 | Method of treating post-inflammatory hyperpigmentation in black skin with a retinoid, and method of lightening black skin with a retinoid | John J. Voorhees, Christopher E. M. Griffiths | 2000-01-25 |
| 5750570 | Method of treatment of hyperpigmentation in black skin with retinoic acid and method of lightening black skin with retinoic acid | John J. Voorhees, Christopher E. M. Griffiths | 1998-05-12 |
| 5266307 | Retinoic acid as a skin tanning agent in persons of light skin color | John J. Voorhees, Christopher E. M. Griffiths | 1993-11-30 |