Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5268776 | System for partially erasing thermally written liquid crystal element | Makoto Tachikawa, Noboru Azusawa, Tadahiko Hashimoto, Toru Ishikawa | 1993-12-07 |
| 4964719 | Control method of brightness of screen used for projection display and control apparatus of the same | Makoto Tachikawa, Osamu Suzuki, Tadahiko Hashimoto, Ichirou Katsuyama | 1990-10-23 |