Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8860772 | Digital broadcast receiver | — | 2014-10-14 |
| 4898022 | Steam trap operation detector | Hideaki Yumoto, Masao Yonemura, Mamoru Nagase, Yoshiyasu Fujiwara, Masakatsu Okamoto +1 more | 1990-02-06 |
| 4888978 | Instrument to measure leakage of steam from a steam trap | Hideaki Yumoto, Masao Yonemura | 1989-12-26 |
| 4295112 | Residual current transformer | Hiroshi Okumura, Shoji Murakami | 1981-10-13 |