Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7413163 | Rack and pinion wheel drive for an industrial sliding blade damper | David F. McGrath, Gregory Perkins | 2008-08-19 |
| 6123319 | Damper valve having an adjustable seat | — | 2000-09-26 |
| 5494257 | Damper valve having an adjustable seat | — | 1996-02-27 |
| 4924456 | High speed modem | Karl J. Zorzi, Harunori Yoshikawa, Venkat S. Prasad, Fred G. Smith, Ming-Chih Hsieh | 1990-05-08 |
| 4821771 | Diverter valve with bellows seal | — | 1989-04-18 |
| 4771417 | High speed modem | Karl J. Zorzi, Harunori Yoshikawa, Venkat S. Prasad, Fred G. Smith | 1988-09-13 |
| 4749168 | Damper plate sealing mechanism | Robert K. Broyles | 1988-06-07 |
| 4215243 | Automatic modem identification system | — | 1980-07-29 |