Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6574342 | Hearing aid fitting system | Xiaoling Fang, Darrell Rose, Douglas M. Chabries | 2003-06-03 |
| 6568760 | Chair of modular construction | Marcus C. Koepke, Jamie Krull, Jay R. Machael, Matthew J. Phillips, Douglas A. Schroeder +4 more | 2003-05-27 |
| 6201875 | Hearing aid fitting system | Xiaoling Fang, Darrell Rose, Douglas M. Chabries | 2001-03-13 |
| 6199952 | Chair control gas spring retainer for chair height reduction | — | 2001-03-13 |
| 6129638 | Golf swing training apparatus | — | 2000-10-10 |
| 6044162 | Digital hearing aid using differential signal representations | Carver A. Mead, Douglas M. Chabries | 2000-03-28 |
| 5907299 | Analog-to digital converter with delta-sigma modulator | Robert S. Green | 1999-05-25 |
| 5749125 | Hinge bracket for a cabinet door | Kirk Arlo Petersen | 1998-05-12 |