| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 24 | |
| #2 | Canada | 6 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Mechanical elements | |
| #3 | Engines, pumps and turbines | |
| #4 | Transport | |
| #5 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Cranes | |
| #2 | Servomotors | |
| #3 | Transport or storage devices | |
| #4 | Machines | |
| #5 | Winches | |
| #6 | Railway systems | |
| #7 | Venting or aerating devices | |
| #8 | Elevators and escalators | |
| #9 | Unspecified technologies | |
| #10 | Vehicle servicing |
| # | Name | Total Patents |
|---|---|---|
| #1 | True George A | 10 |
| #2 | William Robertson | 5 |
| #3 | Vogt Albert F | 5 |
| #4 | Racklyeft John W | 3 |
| #5 | Thurber Edward J | 3 |
| #6 | Robertson William | 2 |
| #7 | Schaitberger Daniel A | 2 |
| #8 | Reid Edward S | 1 |
| #9 | Frederick Killaire | 1 |
| #10 | Schaiteberger Daniel A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3147418A | Plural motor hoist with saturable reactor control | |
| US3029372A | Stepless hoist control | |
| US2846631A | Eddy-current brake for hoists and the like | |
| US2811262A | Double hook type crane structure | |
| US2328362A | Power drive mechanism | |
| US2319868A | Control unit | |
| US1744987A | Trolley | |
| US1580167A | Trolley | |
| US1610884A | Trolley | |
| US1491424A | Crane cab | |
| US1514931A | Crane | |
| US1185146A | Rotary starter. | |
| US1185147A | Starter for internal-combustion engines. | |
| US1271805A | Valve mechanism. | |
| US1128551A | Crane-trolley. | |
| US1035922A | Monorail-trolley-truck construction. | |
| US1017824A | Crane. | |
| US1144972A | Crane. | |
| US953448A | Trolley. | |
| US981820A | Crane. |