| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Argentina | 2 | |
| #3 | Australia | 2 | |
| #4 | WIPO (World Intellectual Property Organization) | 2 | |
| #5 | Italy | 1 | |
| #6 | Taiwan | 1 | |
| #7 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Elevators and escalators | |
| #2 | Indexing scheme relating to hinges | |
| #3 | Wing fittings |
| # | Name | Total Patents |
|---|---|---|
| #1 | O'Donnell Timothy P | 8 |
| #2 | Nguyen Hai T | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US5899302A | Elevator door interlock | |
| US5878846A | Light duty elevator door operator | |
| ITRM950581A1 | Elevator door restraint system which operates when the car is not in hoistway passenger exit position - has coupling with pair of elongate parallel engagement blades mounted on car defining a passageway, and a mechanical restraint with a locking arm pivotally mounted on first portion of car | |
| US5730254A | Elevator door restraint device |