Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D506154 | Hand held pressure gauge | David Cowan | 2005-06-14 |
| 6898979 | Automobile air conditioning system hand held pressure measuring device | David Cowan, Saul Trachtenberg | 2005-05-31 |