| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | United States | 4 | |
| #3 | United Kingdom | 2 | |
| #4 | Australia | 1 | |
| #5 | Brazil | 1 | |
| #6 | China | 1 | |
| #7 | Finland | 1 | |
| #8 | Norway | 1 | |
| #9 | Poland | 1 | |
| #10 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Elevators and escalators |
| # | Name | Total Patents |
|---|---|---|
| #1 | Glaser Walter | 14 |
| #2 | Glaser Herbert P | 5 |
| #3 | Glaser Walter G | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US5443142A | Elevator door tampering protection system | |
| US4423799A | Vehicle door lock for limiting door opening to specified vehicle positions | |
| US4364454A | Vehicle door lock for limiting door opening to specified vehicle positions | |
| CA1105160A | Elevator system door tampering protection circuits | |
| US4108281A | Elevator door tampering protection system |