Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6063938 | Process for producing .epsilon.-caprolactone | Kazuo Tanaka, Kengi Nakaya, Hideaki Fujita | 2000-05-16 |
| 5895820 | Process for the production of trimellitic acid and process for the production of trimellitic acid anhydride | Kazuo Tanaka, Masashi Yabuno, Hiroshi Ogawa | 1999-04-20 |
| 4776008 | Key-in sound-generating circuit | — | 1988-10-04 |