Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876637 | Power converter and method of controlling the same | Yasuhiro Andoh, Tatuhisa Kitasin | 1989-10-24 |
| 4818890 | Turbine helper drive apparatus | Akio Hirata, Suzuo Saito, Hidehiko Kikuchi | 1989-04-04 |