| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 24 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Electrical machinery and energy | |
| #3 | Surface technology and coating | |
| #4 | Machines | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Processing photographic materials | |
| #3 | Semiconductor light sources | |
| #4 | Electric switches | |
| #5 | Frames | |
| #6 | Unspecified technologies | |
| #7 | Optical systems | |
| #8 | Layered products |
| # | Name | Total Patents |
|---|---|---|
| #1 | Albert Drucker | 5 |
| #2 | Nicholas Harold I | 4 |
| #3 | Davis Ernest W | 3 |
| #4 | Samuel Drucker | 2 |
| #5 | Leo Frankel | 1 |
| #6 | Horak Jaroslav | 1 |
| #7 | Pieiss Walter H | 1 |
| #8 | Drucker George A | 1 |
| #9 | Tyrrell Frederick S | 1 |
| #10 | Cernohouz James | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2388394A | Photographic device and appurtenance for reproduction purposes | |
| US2369220A | Film developing reel | |
| US2293660A | Flashlight | |
| US2313166A | Switch | |
| US2310850A | Camera | |
| US2311822A | Camera | |
| US2285768A | Lens mounting | |
| US2309527A | Print drier | |
| US2286351A | Print washer | |
| US2303920A | Photographic apparatus | |
| US2293598A | Camera | |
| US2241596A | Sunshade and filter holder for camera lenses | |
| US2207211A | Negative carrier for enlargers | |
| US2169073A | Film clip | |
| US2270517A | Projection apparatus | |
| US2148872A | Switch device | |
| US1814299A | Flash lamp | |
| US1349972A | Photographic-plate rack | |
| US1378999A | Turntable-support for cameras | |
| US1450433A | Motion-picture camera |