| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 1 | |
| #3 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Packaging and shipping | |
| #3 | Audio-visual technology | |
| #4 | Measurement | |
| #5 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Handling thin material | |
| #3 | Measuring length, angles and areas | |
| #4 | Office furniture | |
| #5 | Photosensitive materials | |
| #6 | Television | |
| #7 | Electrography |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schwab William R | 6 |
| #2 | Fish Ezra B | 2 |
| #3 | Ellis Calvin J | 2 |
| #4 | Ellis Calvin John | 1 |
| #5 | Jones Frank E | 1 |
| #6 | Schwab Charles A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1427741A | Photographic developing and fixing apparatus | |
| US1234746A | Roll or spool centering device. | |
| US1112369A | Photographic copy-holder. | |
| US1141012A | Photographic material. | |
| US1070848A | Copy-holder for photographic apparatus. | |
| US1266060A | Photographic apparatus. | |
| US1115586A | Rewinding device. | |
| US1084492A | Photographic apparatus. | |
| US1053068A | Feeding and measuring device. | |
| CA130179A | Photoplanograph | |
| US978719A | Copy-holder. | |
| US929757A | Photoplanograph. |