Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5025891 | Escape for a building | Yutaka Asai, Shouzi Naka | 1991-06-25 |
| 4843789 | Ceiling construction | — | 1989-07-04 |
| 4646490 | Top rail for use with handrails | Takeshi Miyashiro, Yoshihide Sugimoto | 1987-03-03 |
| 4619086 | Ceiling construction | — | 1986-10-28 |
| 4602766 | Top rail of a handrail | Takeshi Miyashiro, Yoshihide Sugimoto | 1986-07-29 |
| 4593493 | Access door | Takehiko Okushima, Tatsuo Shoji | 1986-06-10 |
| D283548 | Access door | — | 1986-04-22 |
| 4566233 | Ceiling construction | — | 1986-01-28 |
| 4486987 | Stair nosing | — | 1984-12-11 |
| 4455797 | Stair nosing | — | 1984-06-26 |
| D273995 | Access door | — | 1984-05-22 |
| D273994 | Access door | — | 1984-05-22 |
| 4443973 | Access door and framing apparatus for the access door's framework | — | 1984-04-24 |
| 4321293 | Stair mat | — | 1982-03-23 |
| 4321294 | Stair mat | — | 1982-03-23 |
| 4318951 | Stair mat | Takeshi Miyashiro, Yoshihide Sugimoto | 1982-03-09 |
| 4244443 | Drawer type emergency escape | — | 1981-01-13 |
| 4240521 | Drawer type emergency escape | — | 1980-12-23 |
| 4236601 | Turning type emergency escape | — | 1980-12-02 |
| 4220316 | Top rail for use on railing construction | Takeshi Miyashiro, Hidetoshi Kawase, Yoshihde Sugimoto, Tsutomu Shirataki, Hiroshi Morishita | 1980-09-02 |