Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890258 | Schedule setting method | Shinji Tsugei, Shigeki Iguchi | 1989-12-26 |
| 4858125 | Electronic cone with environmental and human body condition sensors and alarm for indicating existence of undesirable conditions | Isamu Washizuka, Shinji Tsugei | 1989-08-15 |