| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 6 | |
| #3 | Japan | 4 | |
| #4 | EPO (European Patent Office) | 3 | |
| #5 | Germany | 2 | |
| #6 | France | 2 | |
| #7 | Sweden | 2 | |
| #8 | Republic of Korea | 1 | |
| #9 | Taiwan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Semiconductors | |
| #4 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Springs | |
| #2 | Unspecified technologies | |
| #3 | Compressed gas holders | |
| #4 | Gearing | |
| #5 | Servomotors | |
| #6 | Venting or aerating devices | |
| #7 | Pistons and sealings | |
| #8 | Semiconductor devices | |
| #9 | Punching metal |
| # | Name | Total Patents |
|---|---|---|
| #1 | Holley David M | 11 |
| #2 | Cotter Jonathan P | 5 |
| #3 | Cotter Patrick J | 4 |
| #4 | Darnell Donald E | 2 |
| #5 | Holley David Maxwell | 2 |
| #6 | Holley D M | 2 |
| #7 | Deibuitsudo Emu Horii | 1 |
| #8 | Bazin Jr Barney P | 1 |
| #9 | Jiyonasan Pii Kotsutaa | 1 |
| #10 | Wallhausen Kenneth H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5275387A | Gas spring | |
| US5020570A | Combined valve modular control panel | |
| US5129635A | Gas spring with c-shaped seal | |
| CA2017008C | Rack and pinion lifter | |
| US5125290A | Rack and pinion lifter | |
| US4792128A | No grow gas spring | |
| US4838527A | Convertible gas spring | |
| US4550899A | Pneumatic spring | |
| CA1194046A | Pneumatic spring | |
| US3447388A | Actuators | |
| US3400593A | Parts lifting equipment for die press | |
| US3265805A | Semiconductor power device |