Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876765 | Door apparatus with magnetic support | — | 1989-10-31 |
| 4868431 | Linear motor with an elongated core using oppositely polarized magnets to maximize perpendicular flux lines | Tsutomu Shinya, Tetsuo Oishi | 1989-09-19 |