| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 9 | |
| #2 | United States | 9 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machine tools | |
| #3 | Machines | |
| #4 | Mechanical elements | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Pumps | |
| #2 | Presses | |
| #3 | Unspecified technologies | |
| #4 | Positive-displacement engines | |
| #5 | Venting or aerating devices | |
| #6 | Servomotors | |
| #7 | Rotary-pistons | |
| #8 | Testing of structures |
| # | Name | Total Patents |
|---|---|---|
| #1 | Landenberger Henry W | 7 |
| #2 | Cannon Earl | 4 |
| #3 | Earl Cannon | 4 |
| #4 | Link Harry Wesley | 3 |
| #5 | Link Harry W | 1 |
| #6 | Landenberger Henry William | 1 |
| #7 | Wesley Link Harry | 1 |
| #8 | Benjamin Lassman | 1 |
| #9 | Cannon Karl | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1878862A | Rotary pump | |
| US1855060A | Pressure control system | |
| US1929643A | Valve | |
| US1863448A | Control system for rams | |
| US1811138A | Apparatus for pressure testing | |
| US1828643A | Hydraulic operating mechanism | |
| US1738375A | Fluid pump | |
| US1656034A | Hydraulic-control system | |
| US1885077A | System of control | |
| CA302755A | Control system for rams | |
| CA273179A | Hydraulic control system | |
| CA260452A | Fluid pump | |
| CA316292A | Rotary pump | |
| CA262381A | Fluid control system | |
| CA341079A | Speed and load regulating device for hydraulic transmissions | |
| CA285152A | Hydraulic operating mechanism | |
| CA344059A | Fluid control mechanism | |
| CA236118A | Hydraulic mechanism |