Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8854138 | Buffer amplifier | — | 2014-10-07 |
| 7733172 | DC self-biased vacuum tube differential amplifier with grid-to-cathode over-voltage protection | — | 2010-06-08 |
| D598004 | Vacuum tube amplifier | — | 2009-08-11 |
| 7482867 | Single stage balanced voltage amplifier | — | 2009-01-27 |
| 7304535 | Balanced amplifier | — | 2007-12-04 |
| 6190174 | Electronic story board | — | 2001-02-20 |