Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5203878 | Fuel oil additives | Lin-Han Yen, Chu K. Sing | 1993-04-20 |
| D326231 | Wristwatch | — | 1992-05-19 |
| D323995 | Wristwatch | — | 1992-02-18 |
| D322410 | Wristwatch | — | 1991-12-17 |
| D319984 | Wristwatch | — | 1991-09-17 |
| D319401 | Watch case | — | 1991-08-27 |
| D317873 | Wristwatch | — | 1991-07-02 |
| D317874 | Wristwatch | — | 1991-07-02 |
| D312973 | Wristwatch | — | 1990-12-18 |
| D311693 | Wristwatch | — | 1990-10-30 |
| D311694 | Wristwatch | — | 1990-10-30 |
| D309865 | Wristwatch | — | 1990-08-14 |
| D309864 | Wristwatch | — | 1990-08-14 |
| D303770 | Wristwatch | — | 1989-10-03 |
| D302131 | Wristwatch | — | 1989-07-11 |
| D302132 | Wristwatch | — | 1989-07-11 |
| D302133 | Wristwatch | — | 1989-07-11 |
| D302134 | Wristwatch | — | 1989-07-11 |
| D289502 | Wristwatch | — | 1987-04-28 |