| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Canada | 5 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Transport | |
| #5 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Cranes | |
| #2 | Unspecified technologies | |
| #3 | Railway systems | |
| #4 | Belts or cables for driving | |
| #5 | Shafts | |
| #6 | Horticulture |
| # | Name | Total Patents |
|---|---|---|
| #1 | Opsal Andrew | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US1279746A | Log-loading boom. | |
| US1205778A | Logging wire-rope carriage. | |
| CA170052A | Load transmission system | |
| US1106471A | Wire-rope-transmission carriage. | |
| CA159850A | Carriage for carrier systems | |
| CA159849A | Carrier mechanism | |
| CA139272A | Logging block | |
| US917738A | Choker-line for log-hauling cables. | |
| US917349A | Swivel. | |
| CA111424A | Pulley block | |
| US845041A | Pulley-block. |