| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Machines | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Elevators and escalators | |
| #2 | Unspecified technologies | |
| #3 | Indexing scheme relating to hinges | |
| #4 | Hinges for doors or windows |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schweig Julius A | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US2233853A | Lock and switch mechanism for elevator shaft doors | |
| US1995903A | Lock and switch mechanism for elevator shaft doors | |
| US2017736A | Door operating mechanism | |
| US2017735A | Door operating mechanism | |
| US1913725A | Dumb waiter door unit | |
| US1943042A | Door operating mechanism | |
| US1709596A | Lock for elevator doors | |
| US1709595A | Elevator door | |
| US1771102A | Elevator door | |
| US1655977A | Guide shoe for elevator doors | |
| US1662342A | Lock for elevator doors | |
| CA280492A | Guide shoe for elevator doors | |
| CA285855A | Lock for elevator doors |