Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 10571037 | Positive pressure relief valve | David Kordonowy, Robert Renshaw | 2020-02-25 | |
| 6192123 | Method and apparatus for initiating telephone calls using a data network | David P. Grunsted, Bruce A. Botkin, Daniel L. Kemp, Kevin Dohrmann | 2001-02-20 | $690,000 |