| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 37 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Engines, pumps and turbines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Haas Lucien L | 26 |
| #2 | Mackenzie Roy J | 12 |
| #3 | Starkweather Gail C | 11 |
| #4 | Grant Hector Luther | 3 |
| #5 | Prochnow Felix E | 1 |
| #6 | Gould John H | 1 |
| #7 | Haas Luclen L | 1 |
| #8 | Frank Hyatt | 1 |
| #9 | Schultz Howard L | 1 |
| #10 | Lucien L Haas | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2157030A | Exhaust muffling means | |
| US2157029A | Muffler | |
| US2146183A | Muffler | |
| US2194550A | Muffler | |
| US2124933A | Muffler | |
| US2124916A | Muffler | |
| US2176615A | Muffler | |
| US2182204A | Silencing the exhaust of internal combustion engines | |
| US2150811A | Muffler | |
| US2112964A | Muffler | |
| US2115103A | Muffler | |
| US2115128A | Muffler | |
| US2131001A | Muffler | |
| US2117955A | Tubular connecter | |
| US2065232A | Muffler | |
| US2115113A | Muffler | |
| US2047443A | Muffler | |
| US2055661A | Muffler construction | |
| US2047442A | Muffler | |
| US2083840A | Muffler |