| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 19 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Rotary-pistons | |
| #2 | Shafts | |
| #3 | Pistons and sealings | |
| #4 | Rotary pistons | |
| #5 | Unspecified technologies | |
| #6 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Petersen Peter C | 5 |
| #2 | Verner Jensen Amos | 4 |
| #3 | Watson Louis A | 2 |
| #4 | Bakewell William E | 2 |
| #5 | Peter Pedersen Mads | 1 |
| #6 | Peters Vernon G | 1 |
| #7 | Dennis Charles W | 1 |
| #8 | Marsh Jeruld S | 1 |
| #9 | Wagner Anthony A | 1 |
| #10 | August Camarata Alfred | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3374748A | Pump | |
| US3152551A | Pump | |
| US3015282A | Pump | |
| US2983228A | Pump | |
| US2816513A | Pump | |
| US2481560A | Sanitary pump | |
| US2461624A | Sanitary pump | |
| US2272318A | Reversing relief valve | |
| US2131968A | Reversibly associated rotary pump and valve device | |
| US2057205A | Combination bearing and sealing means for rotary pumps | |
| US1877688A | Rotary pump | |
| US1863160A | Rotary pump | |
| US1853430A | Rotary pump | |
| US1799237A | Rotary pump | |
| US1743977A | Rotary engine | |
| US1709580A | Rotary pump | |
| US1639961A | Self-metering rotary pump | |
| US1496737A | Rotary pump, motor, or engine | |
| US1362733A | Internal bearing structure | |
| CA555096A | Pump |