RUTH RUDOLF has a total of 13 patent applications. Its first patent ever was published in 1909. It filed its patents most often in Austria, United Kingdom and Belgium. Its main competitors in its focus markets optics are DUFAY LOUIS, CHRISTENSEN JENS HERMAN and JENS HERMAN CHRISTENSEN.
# | Country | Total Patents | |
---|---|---|---|
#1 | Austria | 4 | |
#2 | United Kingdom | 3 | |
#3 | Belgium | 2 | |
#4 | Canada | 2 | |
#5 | United States | 2 |
# | Industry | |
---|---|---|
#1 | Optics |
# | Technology | |
---|---|---|
#1 | Photosensitive materials | |
#2 | Photomechanical semiconductor production |
# | Name | Total Patents |
---|---|---|
#1 | Ruth Rudolf | 13 |
#2 | Schuller Aladar | 4 |
Publication | Filing date | Title |
---|---|---|
US1093948A | Photographic process of making prints in natural colors. | |
CA146314A | Polychrome screen for colour photography | |
US1091443A | Polychrome screen and process of making the same. | |
GB191222451A | Improvements in or relating to Polychrome Screens for Colour Photography. | |
GB191019554A | Improved Manufacture of Colour Screens for Colour Photography. | |
CA125164A | Photographic plate or film | |
GB190925998A | Improvements in Colour Photography. |