Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4817863 | Vortex valve flow controller in VAV systems | Richard G. Carothers, Kenneth A. MacLeod, Marvin D. Nelson | 1989-04-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4817863 | Vortex valve flow controller in VAV systems | Richard G. Carothers, Kenneth A. MacLeod, Marvin D. Nelson | 1989-04-04 |