Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5083501 | Ventilation window unit | Daniel E. Friesen, Gordon M. Comeau | 1992-01-28 |
| 4856123 | Toilet apparatus for use by bed ridden patients | D. Grant Henderson, David Kroeker | 1989-08-15 |
| 4756724 | Extracting radon gases from a domestic water supply | — | 1988-07-12 |
| 4744109 | Gas-sealing insert for floor drains | — | 1988-05-17 |
| 4510791 | Method and apparatus for testing the air-tightness of a building using transient pressurization | — | 1985-04-16 |