| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 27 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Unspecified technologies | |
| #3 | Springs | |
| #4 | Tools for connecting or disengaging | |
| #5 | Measuring length, angles and areas | |
| #6 | Unspecified technologies | |
| #7 | Turning | |
| #8 | Testing of structures |
| # | Name | Total Patents |
|---|---|---|
| #1 | Spase Charles B | 11 |
| #2 | Ira Saks | 8 |
| #3 | Daniel Kelleher | 5 |
| #4 | Skelton Charles E | 2 |
| #5 | Otto Rose | 1 |
| #6 | Jarrett George T | 1 |
| #7 | Higgins Albert J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2541296A | Clutch plate | |
| US2556823A | Clutch plate | |
| US2464871A | Balancing machine chuck | |
| US2437537A | Clutch plate | |
| US2502653A | Clutch plate | |
| US2443505A | Locking plate for clutch levers and the like | |
| US2501057A | Wear take-up means for friction clutches | |
| US2561800A | Clutch plate hub | |
| US2445638A | Friction clutch | |
| US2321941A | Clutch plate | |
| US2339430A | Clutch plate | |
| US2190874A | Clutch pressure plate | |
| US2184005A | Clutch | |
| US2180746A | Clutch disk | |
| US2124013A | Clutch plate | |
| US2053849A | Clutch plate | |
| US2059407A | Clutch testing device | |
| US2022549A | Bushing puller | |
| US2066699A | Carrier for indicating gauges | |
| US2044818A | Clutch testing and rebuilding device |