| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Vehicle brake control systems | |
| #3 | Unspecified technologies | |
| #4 | Internal-combustion piston engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Sawtelle Charles A | 11 |
| #2 | Spiegel Louis M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2411639A | Wear compensating brake mechanism | |
| US2459394A | Liquid pressure brake mechanism | |
| US2386913A | Wear compensator for brakes | |
| US2386912A | Fluid clutch | |
| US2348500A | Vehicle brake | |
| US2348499A | Brake shoe | |
| US2312363A | Vehicle brake | |
| US2273223A | Brake mechanism | |
| US1201507A | Internal-combustion engine. | |
| CA86629A | Revoluble explosive engine | |
| US1035478A | Fluid-clutch. |