| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 52 | |
| #2 | Canada | 11 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Surface technology and coating | |
| #3 | Machines | |
| #4 | Control | |
| #5 | Textiles and paper | |
| #6 | Thermal processes | |
| #7 | Consumer goods |
| # | Name | Total Patents |
|---|---|---|
| #1 | Powers Frank T | 63 |
| Publication | Filing date | Title |
|---|---|---|
| US2411108A | Developing colloid resists with substantive dyes | |
| US2411109A | Etching rotogravure printing members | |
| US2387349A | Apparatus for preparing photoengraving plates | |
| US2407382A | Traffic light | |
| US2357969A | X-ray cassette | |
| US2371843A | X-ray cassette | |
| US2381556A | Cassette | |
| US2402206A | Traffic light | |
| US2388762A | Plate burner | |
| US2359582A | Cassette | |
| US2391191A | X-ray cassette | |
| US2321156A | X-ray cassette | |
| US2356946A | Plate whirler | |
| US2358590A | Strip film | |
| US2331225A | X-ray apparatus | |
| US2254807A | Cooler | |
| US2258906A | Cooler | |
| US2282427A | Process camera | |
| US2287271A | Process camera | |
| US2221998A | Plate cooling method and apparatus |