Issued Patents 2023
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11777999 | Voice communication system and redundancy method for call control server | — | 2023-10-03 |
| 11698141 | Pressure reducing valve | Kazushi Numazaki, Tetsuya Kaneko, Kazuhiro Takabayashi, Kazuo Haneda, Yuya Kihara | 2023-07-11 |
| 11546462 | Relaying device and method of recording voice communication | — | 2023-01-03 |