| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 17 | |
| #2 | Canada | 6 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Packaging and shipping | |
| #3 | Machines | |
| #4 | Transport | |
| #5 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Belts or cables for driving | |
| #2 | Cranes | |
| #3 | Unspecified technologies | |
| #4 | Winches | |
| #5 | Lubricating | |
| #6 | Marine propulsion | |
| #7 | Ropes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wirkkala Oscar A | 23 |
| Publication | Filing date | Title |
|---|---|---|
| US2978040A | Marine propeller | |
| US2375719A | Shackle | |
| US2371009A | Cargo handling rigging | |
| US2351176A | Hook and cable connection | |
| US2135994A | Material handling device | |
| US1757156A | Flexible wire rope | |
| US1675778A | Choker-hook rigging | |
| US1685473A | Bull hook | |
| US1536738A | Bull hook | |
| US1460808A | Logging bull hook | |
| US1496142A | Cable eijob | |
| US1464162A | Choker hook | |
| US1464161A | Logging choker rigging | |
| US1439349A | Lubricating system for logging blocks | |
| US1461338A | Logging engine | |
| US1336877A | Logging system | |
| US1251157A | Logging system. | |
| CA644443A | Choker hook | |
| CA395528A | Choker hook | |
| CA484041A | Propellers |