| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 4 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Transport | |
| #3 | Consumer goods | |
| #4 | Civil engineering | |
| #5 | Weapons | |
| #6 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Writing or drawing tools | |
| #3 | Harvesting | |
| #4 | Bolts for doors or windows | |
| #5 | Vehicles drawn by animals | |
| #6 | Locks | |
| #7 | Vehicle windows, roofs and doors | |
| #8 | Mountings for cannons and pistols | |
| #9 | Harnesses | |
| #10 | Ships |
| # | Name | Total Patents |
|---|---|---|
| #1 | Campbell William J | 14 |
| #2 | Hedrick George W | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5361526A | Quick release child resistant safety and security device | |
| US2950617A | Device for testing the abrasion-resistance of surfaces of metallic articles | |
| US2512609A | Safety stop | |
| US1353215A | Eraser attachment for pencils | |
| CA190901A | Beet puller and topper | |
| US1279251A | Beet puller and topper. | |
| CA151210A | Draft equalizer | |
| US1027988A | Draft-equalizer. | |
| US891460A | Combined front and apron for vehicles. | |
| US836920A | Hame-tug. | |
| CA723882A | Latches for doors | |
| CA719440A | Door handles |