Issued Patents All Time
Showing 51–53 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4909966 | Naphthoquinone derivatives | Teh-Ming Kung, Ralph H. Young | 1990-03-20 |
| 4869984 | Electrophotographic elements containing certain naphthoquinone derivatives as electron-transport agents | Teh-Ming Kung, Ralph H. Young | 1989-09-26 |
| 4869985 | Electrophotographic elements containing certain naphthoquinone derivatives as electron-transport agents | Teh-Ming Kung, Ralph H. Young | 1989-09-26 |