| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Australia | 1 | |
| #3 | Brazil | 1 | |
| #4 | Denmark | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Spain | 1 | |
| #7 | Finland | 1 | |
| #8 | Norway | 1 | |
| #9 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Electrical machinery and energy | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Rotary pistons | |
| #2 | Pumps | |
| #3 | Resistors | |
| #4 | Ships |
| # | Name | Total Patents |
|---|---|---|
| #1 | Perkins Gerard T | 6 |
| #2 | Zepp Lawrence P | 2 |
| #3 | Berkins Gerard T | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4651123A | Linear potentiometer | |
| US4644893A | Position indicating apparatus for use in a boat leveling system | |
| US4540343A | Spherical gear pump |