| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 19 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Civil engineering | |
| #3 | Machine tools | |
| #4 | Machines | |
| #5 | Packaging and shipping |
| # | Name | Total Patents |
|---|---|---|
| #1 | Tomkinson Charles C | 10 |
| #2 | Mcintosh Roy E | 4 |
| #3 | Ogden Ralph E | 3 |
| #4 | Prescott Arthur T | 3 |
| #5 | Tassell Arthur R Van | 1 |
| #6 | Hungerford Daniel C | 1 |
| #7 | Cleve Horatio P Van | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2187363A | Turn-over door | |
| US2030873A | Spring balanced door | |
| US1819828A | Toggle bolt | |
| US1788814A | Toggle bolt | |
| US1795279A | Anchor | |
| US1871095A | Door closure and operating mechanism | |
| US1855645A | Cable clip | |
| US1746326A | Setting tool for bolt anchors | |
| US1800968A | Expansion shield | |
| US1730588A | Expansion shield | |
| US1797808A | Operating and control mechanism for ferry bridges | |
| US1768722A | Door-closure mechanism | |
| US1805319A | Toggle bolt | |
| US1795057A | Expansion shield | |
| US1754841A | Door mechanism | |
| US1769591A | Tool | |
| US1806640A | Expansion shield | |
| US1746046A | Drill | |
| US1752752A | Expansion shield | |
| CA387440A | Turn-over door |