| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Civil engineering | |
| #3 | Machine tools | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Elevators and escalators | |
| #2 | Making metal sheets | |
| #3 | Doors and windows | |
| #4 | Indexing scheme relating to hinges | |
| #5 | Wing fittings | |
| #6 | Punching metal | |
| #7 | Unspecified technologies | |
| #8 | Hinges for doors or windows |
| # | Name | Total Patents |
|---|---|---|
| #1 | Winder Joseph Z | 5 |
| #2 | Bancroft James E | 2 |
| #3 | Winder Joseph Zimmer | 2 |
| #4 | Keller Walter B | 1 |
| #5 | Ball Hallack Carey | 1 |
| #6 | Frederick Coates | 1 |
| #7 | Hewitt Walter B | 1 |
| #8 | Ball Halleck C | 1 |
| #9 | Peelle Charles W | 1 |
| #10 | Ball Hallack C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2077659A | Door operating mechanism | |
| US2006082A | Door operating mechanism | |
| US1863961A | Safety device for suspended doors | |
| US1857227A | Electromechanical interlock mechanism | |
| US1725041A | Electromechanical interlock | |
| US1704901A | Elevator door | |
| US1646533A | Machine for covering wood with sheet metal | |
| US1602636A | Electric interlock for elevator doors | |
| US1711513A | Fire door | |
| US1661108A | Tube-forming die | |
| CA260730A | Fire door | |
| CA256019A | Electric interlock for elevator doors |