Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886558 | Method for heat-treating steel rail head | Toyokazu Teramoto, Akio Fujibayashi, Kozo Fukuda, Mashiro Ueda, Shinichi Nagahashi +5 more | 1989-12-12 |
| 4885681 | I/O Execution method for a virtual machine system and system therefor | Hidenori Umeno, Takashige Kubo, Nobutaka Hagiwara, Hideo Sawamoto | 1989-12-05 |
| 4879195 | Laser-sensitive electrophotographic material | Kunitaka Toyofuku, Kohei Michikawa | 1989-11-07 |
| 4864392 | Image processing apparatus for logarithmically converting an image input signal into a density signal and standardizing the input range of the image input signal with the same conversion table | — | 1989-09-05 |