Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840220 | Heat pump with electrically heated heat accumulator | Kenji Umezu | 1989-06-20 |
| 4803734 | Method of and apparatus for detecting pattern defects | Hiroyuki Onishi, Tetsuo Hoki, Eiji Kodama, Hisayuki Tsujinaka, Ryuji Kitakado | 1989-02-07 |
| 4799175 | System for inspecting pattern defects of printed wiring boards | Tetsuo Hohki, Eiji Kodama, Takumi Yoshida, Masafumi Kawatani, Hisayuki Tsujinaka | 1989-01-17 |
| 4797939 | Pattern masking method and an apparatus therefor | Tetsuo Hoki, Ryuji Kitakado, Yoshinori Sezaki, Tomiji Hotta, Hironobu Yano | 1989-01-10 |