| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Machines | |
| #3 | Electrical machinery and energy | |
| #4 | Packaging and shipping | |
| #5 | Mechanical elements | |
| #6 | Consumer goods | |
| #7 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hamilton Francis F | 13 |
| #2 | Voorhees Harold E Van | 3 |
| #3 | Lundquist Arthur R | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2180519A | Nail coating stencil | |
| US1966891A | Exhaust muffler | |
| US1857845A | Exhaust gas silencer | |
| US1869419A | Sound damped muffler | |
| US1815005A | Exhaust gas muffler | |
| US1726264A | Method of making spark plugs | |
| US1777522A | Exhaust muffler | |
| US1712210A | Muffler | |
| US1709217A | Exhaust muffler | |
| US1549767A | Lock for boxes | |
| US1503894A | Chest of trays | |
| CA297914A | Muffler | |
| CA286567A | Exhaust muffler |