| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13 | |
| #2 | Canada | 2 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Mechanical elements | |
| #3 | Machines | |
| #4 | Transport | |
| #5 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Tools for connecting or disengaging | |
| #2 | Nails | |
| #3 | Unspecified technologies | |
| #4 | Earth drilling | |
| #5 | Parachutes | |
| #6 | Aeroplanes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dunham Charles L | 16 |
| #2 | Robinson Forster | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3013749A | Aircraft structure | |
| US1812938A | Wrench | |
| US1551812A | Underreamer | |
| US1348853A | Underreamer | |
| US1409934A | Nut lock | |
| US1158656A | Pipe-tongs. | |
| US1072320A | Pipe-wrench. | |
| US990122A | Nut-lock. | |
| GB191009514A | New and Useful Improvements in Nut Locks. | |
| CA125587A | Nut lock | |
| US818877A | Pipe-wrench. | |
| US794597A | Tongs. | |
| CA83595A | Nut lock | |
| US705742A | Pipe-wrench. | |
| US705743A | Nut-lock. | |
| US656154A | Pipe-wrench. |