| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 1 | |
| #3 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Basic materials chemistry |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Unspecified technologies | |
| #3 | Mechanical control devices | |
| #4 | Unspecified technologies | |
| #5 | Gearing | |
| #6 | Special lubricating compositions | |
| #7 | Lubricating compositions |
| # | Name | Total Patents |
|---|---|---|
| #1 | Popper Isaac C | 6 |
| #2 | Snyder Raymond R | 1 |
| #3 | Popper Isaac Charles | 1 |
| #4 | Charles Popper | 1 |
| #5 | Maurer Le Roy F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2388571A | Hydraulic coupling | |
| US2390133A | Turbine construction | |
| US2287496A | Hydraulic coupling | |
| US2252642A | Hydraulic coupling | |
| US2255515A | Turbine drive and fluid flywheel and means for transmitting power therein | |
| US2329724A | Transmission | |
| US2179520A | Automatic turbine drive | |
| US2179519A | Hydraulic coupling | |
| US2179518A | Hydraulic turbine clutch and transmission | |
| CA432389A | Hydraulic coupling |