| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Audio-visual technology | |
| #3 | Machine tools | |
| #4 | Machines | |
| #5 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Special information storage | |
| #3 | Vehicle brake control systems | |
| #4 | Unspecified technologies | |
| #5 | Punching metal |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dilks Jr James J | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US2422398A | Recorder and reproducer for spiral photographic disk sound records | |
| US2292825A | Photographic reproduction apparatus | |
| US2188974A | Camera | |
| US2227071A | Picture film viewing apparatus | |
| US2196629A | Photographic printing apparatus | |
| US2186753A | Motion picture projector | |
| US2179617A | Photographic reproduction apparatus | |
| US2051031A | Punching machine | |
| US2102788A | Disk film motion picture | |
| US2095632A | Motion picture projector | |
| US1978250A | Motion picture projection method and apparatus | |
| US1735452A | Braking mechanism |