| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | France | 3 | |
| #3 | Canada | 2 | |
| #4 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Machines | |
| #2 | Cylinders for combustion engines | |
| #3 | Internal-combustion piston engines | |
| #4 | Gearing | |
| #5 | Venting or aerating devices | |
| #6 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Parrish Walter A | 4 |
| #2 | Parrish Walter Alvin | 1 |
| #3 | Gulick Ronald A | 1 |
| #4 | Walter Parrish | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3572140A | High torque manual operator | |
| GB711934A | Improvements in or relating to cylinders for internal combustion engines | |
| GB727233A | Improvements in or relating to an internal combustion engine and method of operatingthe same | |
| US2687709A | Cylinder construction for internalcombustion engines | |
| US2611349A | Opposed piston internal-combustion engine | |
| US2547038A | Reversing gear | |
| CA515915A | Cylindrical construction for an internal combustion engine | |
| CA494473A | Internal combustion engine |