| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | United States | 7 | |
| #3 | United Kingdom | 6 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Transport | |
| #3 | Machines | |
| #4 | Engines, pumps and turbines | |
| #5 | Control |
| # | Technology | |
|---|---|---|
| #1 | Motor vehicles | |
| #2 | Servomotors | |
| #3 | Unspecified technologies | |
| #4 | Gearing | |
| #5 | Venting or aerating devices | |
| #6 | Rotary-pistons | |
| #7 | Systems controlling non-electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hammond Charles Frederick | 4 |
| #2 | Cassaday Ernest W | 2 |
| #3 | Hammond Charles F | 2 |
| #4 | Williams Cassaday Ernest | 2 |
| #5 | David Clay | 1 |
| #6 | Hudgens Bernard C | 1 |
| #7 | Thelen Richard K | 1 |
| #8 | Dettlof Lee A | 1 |
| #9 | Albert Dettlof Leroy | 1 |
| #10 | Newman Percy A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3087436A | Hydraulic pump | |
| US2974491A | Servo system | |
| US2995012A | Servo system | |
| US2896589A | Hydraulic system | |
| US2969775A | Valve | |
| US2847868A | Hydraulic steering gear with a gear rack disposed intermediate piston heads | |
| US2816455A | Power steering mechanism for motor vehicles |