Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7471787 | Method of operating a distributed call progress tone detection system | L. David Chambers, Steve Dye | 2008-12-30 |
| 7043006 | Distributed call progress tone detection system and method of operation thereof | L. David Chambers, Steve Dye | 2006-05-09 |
| 4635639 | Modular physiological instrument | Douglas T. Hakala, Joseph M. Bocek | 1987-01-13 |
| 4430098 | Apparatus for degassing hemodialysis liquid and the like | Donald B. Bowman, Charles J. Filz | 1984-02-07 |
| 4325715 | Apparatus for degassing hemodialysis liquid | Donald B. Bowman, Charles J. Filz | 1982-04-20 |