| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 2 | |
| #2 | France | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Italy | 2 | |
| #5 | Netherlands | 2 | |
| #6 | Austria | 1 | |
| #7 | Australia | 1 | |
| #8 | Switzerland | 1 | |
| #9 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Optical systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Brewer Silas | 1 |
| #2 | Eckstein Viktor | 1 |
| #3 | Broome Barry G | 1 |
| #4 | Sairasu Buriyuaa | 1 |
| #5 | Eckstein Victor | 1 |
| #6 | Brewer Silas H | 1 |
| #7 | Broome Barry | 1 |
| #8 | Berii Buruumu | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU2829777A | Ring prism | |
| NL7407937A | Shutterless type film projector with constant speed film transport - has optical system with focussing lenses and synchronised rotating prisms | |
| GB1416216A | Ring prism and a film projector incorporating such a prism formamidines and their use in pest control |