Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841744 | Double effect air cooled absorption refrigerating machine | Shigekichi Kurosawa, Yoshikazu Nagaoka, Shinichi Kannoh, Sadatoshi Takemoto, Shigeo Sugimoto +5 more | 1989-06-27 |
| 4724547 | Built-in core body in ready-made knot of necktie | — | 1988-02-16 |
| 4504979 | Necktie assembly | — | 1985-03-19 |