Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D265064 | Darts scoring machine | — | 1982-06-22 |
| D262951 | Darts scoring machine | — | 1982-02-09 |
| 4211174 | Wet oxidation of coal for generation of heat energy | Kwang-Tzu Yang | 1980-07-08 |