| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Computer technology | |
| #3 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Registering devices | |
| #2 | Elevators and escalators | |
| #3 | Counting mechanisms |
| # | Name | Total Patents |
|---|---|---|
| #1 | Winslow Lenna R | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US1923603A | Elevator | |
| US1859483A | Elevator | |
| US986790A | Voting-machine. | |
| US986789A | Voting-machine. | |
| US1000062A | Voting-machine. | |
| US963103A | Interlocking mechanism. | |
| US966633A | General voting mechanism. | |
| US965352A | Independent-ballot-voting mechanism. | |
| US966148A | Voting-machine. | |
| CA67044A | Voting machine | |
| CA65373A | Voting machine |