| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 3 | |
| #3 | France | 3 | |
| #4 | United Kingdom | 3 | |
| #5 | Germany | 2 | |
| #6 | Brazil | 1 | |
| #7 | Spain | 1 | |
| #8 | Italy | 1 | |
| #9 | Japan | 1 | |
| #10 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Processing photographic materials | |
| #2 | Cameras |
| # | Name | Total Patents |
|---|---|---|
| #1 | Barto Robert M | 4 |
| #2 | Shelffo Loren E | 3 |
| #3 | Ackermann C | 2 |
| #4 | Mcpherson Patrick F | 2 |
| #5 | Barto R | 1 |
| #6 | F Mcpherson Patrick | 1 |
| #7 | Ackermann Carl A | 1 |
| #8 | A Ackermann Carl | 1 |
| #9 | Harris Robert | 1 |
| #10 | Robaato Emu Baato | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4582423A | Device for degassing diazotype materials by convection heating | |
| CA1134660A | Apparatus for eliminating ammonia fumes emanating from diazo copiers | |
| US4059409A | Apparatus for eliminating ammonia fumes emanating from diazo copiers | |
| US3986191A | Apparatus for developing diazo type film | |
| US3683310A | Printer apparatus rotating cylinder lamp connector | |
| US3804515A | Diazo type copier |