| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Tools for connecting or disengaging | |
| #2 | Unspecified technologies | |
| #3 | Earth drilling | |
| #4 | Laundering textiles | |
| #5 | Soldering, welding and flame cutting | |
| #6 | Unspecified technologies | |
| #7 | Working stone | |
| #8 | Wood working | |
| #9 | Punching metal | |
| #10 | Sawing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hargrave John M | 17 |
| #2 | Farmer Delbert L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2673714A | Rock or masonry drill | |
| US2667678A | Hand clamp | |
| US2245089A | Welder's clamp | |
| US2016088A | Screw | |
| US1881535A | Drill | |
| US1918469A | Clamp and method of manufacturing the same | |
| US1930343A | Clamp tightening machine | |
| US1708617A | Clamp jaw | |
| US1656325A | Clamp | |
| US1639561A | Clamp | |
| US1638848A | Clamp | |
| US1580197A | Clamp | |
| US1456692A | Ratchet hand tool | |
| US1161210A | Work-holding jaw. | |
| US1201461A | Work-holding clamp. | |
| CA268829A | Clamp | |
| CA516857A | Rock or masonry drill |