| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Mechanical elements | |
| #3 | Basic communication technologies | |
| #4 | Measurement | |
| #5 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Motor vehicles | |
| #2 | Gearing | |
| #3 | Mechanical control devices | |
| #4 | Tuning resonant circuits | |
| #5 | Unspecified technologies | |
| #6 | Electromechanical clocks |
| # | Name | Total Patents |
|---|---|---|
| #1 | Pennington Gordon R | 11 |
| #2 | Wellman Samuel K | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2455137A | Radio circuit selector switch | |
| US2422253A | Automatic radio program selector | |
| US1807133A | Belt drive mechanism | |
| US1684070A | Motor vehicle | |
| US1684069A | Belt driving mechanism | |
| US1459185A | Slide-operating mechanism | |
| US1389692A | Transmission mechanism | |
| US1579245A | Spring suspension for track-laying tractors | |
| US1368652A | Track-belt supporting and tightening mechanism | |
| US1174441A | Trailer-truck. | |
| CA363316A | Shock absorber |