Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4281740 | Muffler | William Robert Weiss | 1981-08-04 |
| 4263981 | Vacuum pump exhaust muffler | William Robert Weiss | 1981-04-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4281740 | Muffler | William Robert Weiss | 1981-08-04 |
| 4263981 | Vacuum pump exhaust muffler | William Robert Weiss | 1981-04-28 |