Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12411056 | High output acoustic system for direct field acoustic testing | Marcos A. Underwood, Michael D. Sullivan | 2025-09-09 |
| 12360163 | Testing system that determines contact erosion in circuit breaker | Patrick R. Fischer-Carne | 2025-07-15 |
| 12106910 | Switchgear system that determines contact erosion in circuit breaker | Patrick R. Fischer-Carne | 2024-10-01 |
| 11860230 | Testing system that determines contact erosion in circuit breaker | Patrick R. Fischer-Carne | 2024-01-02 |
| 11804338 | Switchgear system that determines contact erosion in circuit breaker | Patrick R. Fischer-Carne | 2023-10-31 |
| 10317373 | Direct field acoustic testing in a semi-reverberant enclosure | Paul Larkin, Dann Hayes | 2019-06-11 |
| 10014959 | Standing wave reduction in direct field acoustic testing | Paul Larkin, Dann Hayes, Michael D. Sullivan, Arthur Isaacs | 2018-07-03 |
| D693374 | Tractor | Thomas Michael Chlystek, William L. Schroeder, Carl J. Hagele, Aaron Richard, Janusz Matus +2 more | 2013-11-12 |
| D693375 | Tractor | Thomas Michael Chlystek, William L. Schroeder, Carl J. Hagele, Aaron Richard, Janusz Matus +2 more | 2013-11-12 |
| D693376 | Combined tractor front window and exhaust | Thomas Michael Chlystek, William L. Schroeder, Carl J. Hagele, Aaron Richard, Janusz Matus +2 more | 2013-11-12 |
| 7817812 | Compact audio reproduction system with large perceived acoustic size and image | Bradley M. Starobin | 2010-10-19 |
| 7231053 | Enhanced multi-channel audio surround sound from front located loudspeakers | — | 2007-06-12 |
| 7162049 | Ported loudspeaker system and method with reduced air turbulence, bipolar radiation pattern and novel appearance | — | 2007-01-09 |
| 7039212 | Weather resistant porting | John B. Poling, Bradley M. Starobin, Allen S. Baran | 2006-05-02 |
| 6937737 | Multi-channel audio surround sound from front located loudspeakers | — | 2005-08-30 |
| 6721434 | Loudspeaker mounting system | James M. Herd, Robert E. Limbaugh | 2004-04-13 |
| 5809154 | Ported loudspeaker system and method | — | 1998-09-15 |
| 5517573 | Ported loudspeaker system and method with reduced air turbulence | Colin B. Campbell | 1996-05-14 |
| 5475764 | Bandpass woofer and method | — | 1995-12-12 |
| D350135 | Enclosed speaker for vehicle use | William Rupert | 1994-08-30 |
| 4924963 | Compact and efficient sub-woofer system and method for installation in structural partitions | — | 1990-05-15 |
| 4903300 | Compact and efficient sub-woofer system and method for installation in structural partitions | — | 1990-02-20 |
| 4759066 | Sound system with isolation of dimensional sub-speakers | Colin B. Campbell | 1988-07-19 |
| 4638505 | Optimized low frequency response of loudspeaker systems having main and sub-speakers | Colin B. Campbell | 1987-01-20 |
| 4630298 | Method and apparatus for reproducing sound having a realistic ambient field and acoustic image | Colin B. Campbell | 1986-12-16 |