Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4681207 | Escalator | Shigeru Goto, Masaru Asano, Matsuhiko Ishida | 1987-07-21 |
| 4569433 | Escalator system with a drop-down step | Matsuhiko Ishida | 1986-02-11 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4681207 | Escalator | Shigeru Goto, Masaru Asano, Matsuhiko Ishida | 1987-07-21 |
| 4569433 | Escalator system with a drop-down step | Matsuhiko Ishida | 1986-02-11 |