Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10969050 | Air pressure attenuation device | David Campbell | 2021-04-06 |
| 10906703 | Vessel cap | — | 2021-02-02 |
| 8562450 | Recoiling tethered golf ball | — | 2013-10-22 |
| 8336368 | Method and equipment for detecting sealing deficiencies in drainage and vent systems for buildings | John D. Swaffield, David Campbell, Lynne Jack | 2012-12-25 |