| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 20 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machines | |
| #3 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Hand carts | |
| #2 | Unspecified technologies | |
| #3 | Vehicle wheels | |
| #4 | Handling thin material |
| # | Name | Total Patents |
|---|---|---|
| #1 | Irrgang William F | 9 |
| #2 | Clark George E | 5 |
| #3 | Oldroyd Walter J | 2 |
| #4 | Mason George L | 2 |
| #5 | Babcock Pearl D | 1 |
| #6 | Atherton John T | 1 |
| #7 | Brostedt Carl W | 1 |
| #8 | Clark George P | 1 |
| #9 | Noble Boughton T | 1 |
| #10 | Todd Edwin S | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2706643A | Retractable handle | |
| US1901949A | Fastening means for securing the ends of a length of material to a reel | |
| US1649946A | Swivel caster | |
| US1253179A | Lifting and lowering apparatus. | |
| US1253178A | Lifting-truck. | |
| US1174582A | Caster. | |
| US1174581A | Lifting-truck. | |
| CA167712A | Lifting truck | |
| US1174580A | Lifting-truck. | |
| US1167564A | Lifting-truck. | |
| US1136905A | Elevating-truck. | |
| US1102876A | Elevating-truck. | |
| US1135545A | Elevating-truck. | |
| US1174685A | Elevating-truck. | |
| US1092506A | Caster device. | |
| US1136906A | Elevating transfer-truck. | |
| US1174596A | Truck. | |
| US1176684A | Truck. | |
| US1167406A | Truck. | |
| US1152788A | Truck. |