| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Measurement | |
| #5 | Civil engineering | |
| #6 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Gas-flow silencers for machines | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Clutches and brakes | |
| #5 | Crop agriculture | |
| #6 | Street cleaning | |
| #7 | Pipes | |
| #8 | Measuring mechanical vibrations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hedrick Gale H | 5 |
| #2 | Joseph Mader | 2 |
| #3 | Timm Werner F | 1 |
| #4 | Larson John C | 1 |
| #5 | Graham Russell A | 1 |
| #6 | Milne Donald Y | 1 |
| #7 | Holbrook Hedrick Gale | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2959834A | Muffler clamp | |
| US2844210A | Means for determining the effectiveness of sound reducing means | |
| US2742992A | Clutch plates | |
| US2618355A | Muffler with single outlet opening elongated in a direction parallel to the axis of the inlet opening | |
| US2618354A | Retroverted passage type muffler with expansion chambers | |
| US2618353A | Muffler with side branch chambers | |
| US2432780A | Snow plow | |
| US2406553A | Disk mounting | |
| US2398788A | Muffler | |
| US2457890A | Muffler | |
| US2150768A | Muffler |