Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7072476 | Audio headset | Masahisa Masuda | 2006-07-04 |
| 6370245 | Full duplex communication circuits with bilateral T hybrid and balanced impedance configurations | — | 2002-04-09 |
| 5907538 | Full duplex communication circuit with a transducer for simultaneously generating audio output and receiving audio input | — | 1999-05-25 |
| 5202918 | Duplex transducer for simultaneous voice broadcast and reception | — | 1993-04-13 |
| 4802859 | Electrical connector | Thomas E. Gouldy, William C. Knoll, Ernest R. Ritter, deceased, Thomas M. Lynch, Ronald E. Steffey +1 more | 1989-02-07 |
| 4685099 | Method and apparatus for duplex communications | Michael R. Harrison | 1987-08-04 |
| 4652501 | Operation of microbial fuel cells | Hugh P. Bennetto, Gerard M. Delaney, Jeremy R. Mason, John L. Stirling, Sibel Roller +1 more | 1987-03-24 |
| D278904 | Telephone | — | 1985-05-21 |