Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D290052 | Electric washing machine | Takao Ohsawa, Hideki Takayama, Hiroshi Ohsugi | 1987-05-26 |
| D285958 | Water filter | Hiroshi Koizumi, Hideki Takayama, Masatoshi Tanabe | 1986-09-30 |