Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10505453 | Switching audio amplifier | Jerry Alan Rathje | 2019-12-10 |
| 10186970 | Switching audio amplifier | Jerry Alan Rathje | 2019-01-22 |
| 9654064 | Amplifier apparatus with controlled negative output impedance | — | 2017-05-16 |
| 9225301 | Amplifier apparatus with controlled negative output impedance | — | 2015-12-29 |
| 6471464 | Wafer positioning device | Paul Peng, Wei-Min Chen, Gino Tsai, J Fan Chang | 2002-10-29 |
| 6263084 | Power amplifier and loudspeaker frame integration | KARL WARREN FRISCH CRESSMAN | 2001-07-17 |
| 5543759 | Audio amplification circuits | Richard J. Comeau, II | 1996-08-06 |
| 4931018 | Device for training welders | Donald Herbst, David L. Frericks, Bruce A. Blair | 1990-06-05 |
| 4543538 | Complementary output amplifier with an input for offsetting voltages | — | 1985-09-24 |
| 4470089 | Tape unit cleaning device | Bruce A. Hutchins | 1984-09-04 |
| 4378582 | Demagnetizing apparatus | Bruce R. Maier, Bruce A. Hutchins | 1983-03-29 |