Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4850006 | Booster and charger unit used for hand-held portable telephone and having overheat protection circuit | Yoshiharu Tamura | 1989-07-18 |
| 4838916 | Method for making single-polorization, single mode optical fibers | Takao Edahiro, Tetsuo Miya, Katusunari Okamoto, Masao Kawachi | 1989-06-13 |
| 4826802 | Method for preparation of antimony and tellurium-containing metal oxide catalysts | Yoshimi Nakamura, Hiroshi Utsumi, Kunio Mori | 1989-05-02 |