KNUT SCHAEFER has a total of 13 patent applications. Its first patent ever was published in 1955. It filed its patents most often in Germany, United States and United Kingdom. Its main competitors in its focus markets optics are INTERNAT PATENT LICENSING CORP, SLAVATA BOHUMIL and FIORENTINI ACHILLE.
# | Country | Total Patents | |
---|---|---|---|
#1 | Germany | 7 | |
#2 | United States | 4 | |
#3 | United Kingdom | 2 |
# | Industry | |
---|---|---|
#1 | Optics |
# | Technology | |
---|---|---|
#1 | Cameras |
# | Name | Total Patents |
---|---|---|
#1 | Schaefer Knut | 6 |
#2 | Knut Schaefer | 4 |
#3 | Ruhoff Peter | 1 |
Publication | Filing date | Title |
---|---|---|
US3183520A | Cinematographic camera with snap-spring release mechanism | |
US3066591A | Diaphragm control for photographic apparatus | |
US3079836A | Shutter stopping means in motion picture cameras | |
US3033074A | Film guide structure for cinemato-graphic apparatus | |
GB803808A | Cinematographic apparatus |