| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 20 | |
| #2 | Canada | 6 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Machines | |
| #3 | Weapons | |
| #4 | Electrical machinery and energy | |
| #5 | Machine tools | |
| #6 | Engines, pumps and turbines | |
| #7 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Lifting and pushing | |
| #2 | Unspecified technologies | |
| #3 | Targets | |
| #4 | Winches | |
| #5 | Pumps | |
| #6 | Electrically-conductive connections | |
| #7 | Cranes | |
| #8 | Clutches and brakes | |
| #9 | Tools for connecting or disengaging | |
| #10 | Containers for goods storage |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schwerin Frank H | 17 |
| #2 | Schwerin Frank Henry | 5 |
| #3 | Hobbs John W | 2 |
| #4 | Hobbs John Weston | 1 |
| #5 | Karl Eck | 1 |
| #6 | Louis Hebbeln | 1 |
| #7 | Hebbeln Louis | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2458744A | Hydraulic jack | |
| US2435326A | Fluid pump | |
| US2251427A | Lifting jack | |
| US2176277A | Wire cable connector tool | |
| US2153516A | Electrically operated lifting jack | |
| US2104171A | Range target | |
| US2078166A | Throwing machine | |
| US2002455A | Shipping container with mechanical jack | |
| US1889386A | Ratchet jack | |
| US1946242A | Lifting jack | |
| US1904089A | Centrifugal brake | |
| US1884296A | Hoisting device | |
| US1925821A | Lifting jack | |
| US1868922A | Air-motor jack | |
| US1837137A | Screw jack | |
| US1764472A | Lifting jack | |
| US1727205A | Wheel | |
| US1882598A | Lifting jack | |
| US1764988A | Motor-operated jack | |
| US1761412A | Pinion puller |