Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882438 | Photochromatic compounds | Satoshi Imura, Yasuji Kida | 1989-11-21 |
| 4881053 | Electromagnetic relay | Takezo Sano, Tsutomu Shimizu | 1989-11-14 |
| 4879050 | Method for fire extinguishment of chlorosilanes | Hisayoshi Yamaguchi, Tamotsu Yanagisawa, Masao Yabuzuka, Masakatu Shimizu | 1989-11-07 |
| 4863657 | Method of making semi-conductor diffusion furnace components | Yoshiyuki Watanabe | 1989-09-05 |
| 4859385 | Method for making a furnace component | Yoshiyuki Watanabe | 1989-08-22 |
| 4836965 | Method of producing heat treating furnace member | Kenro Hayashi | 1989-06-06 |
| 4833930 | Method of sampling steel material and a device therefor | Kaizo Okamoto, Akira Ichihara, Akimune Sato, Kenji Hirata, Katsuhisa Hirayama +4 more | 1989-05-30 |
| 4830762 | Method for fire extinguishment of liquid chlorosilane compound | Hisayoshi Yamaguchi, Tamotsu Yanagisawa, Masao Yabuzuka, Masakatu Shimizu | 1989-05-16 |