Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8971553 | Electret material and electrostatic-type acoustic transducer | — | 2015-03-03 |
| 8747961 | Process for production of electret material | Kumie Yamana | 2014-06-10 |
| 5635793 | Cathode-ray tube and display unit using the cathode-ray tube | Masatoshi Ochiai, Hidenori Takita, Tatsuhiro Hirakawa, Shinji Nohara | 1997-06-03 |