| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 | |
| #2 | Canada | 4 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Environmental technology | |
| #5 | Civil engineering | |
| #6 | Weapons |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nelson Adolph L | 20 |
| Publication | Filing date | Title |
|---|---|---|
| US2149862A | Piston | |
| US2067278A | Piston | |
| US2086677A | Piston | |
| US2100719A | Piston | |
| US1982396A | Piston | |
| US2038754A | Piston | |
| US1990496A | Piston | |
| US1928842A | Piston | |
| US1548329A | Piston | |
| US1438132A | Piston | |
| US1409757A | Piston | |
| US1595415A | Fuel vaporizer | |
| US1357892A | Handle for automobile-doors | |
| US1370346A | Oiling device for valve-stems | |
| US1372897A | Internal-combustion engine | |
| US1562424A | Control mechanism for aircraft guns | |
| CA382685A | Light metal piston | |
| CA375122A | Piston | |
| CA388485A | Engine piston | |
| CA393305A | Engine piston |