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TECH D OPTIQUE ET DE PHOTOGRAP

Overview
  • Total Patents
    27
About

TECH D OPTIQUE ET DE PHOTOGRAP has a total of 27 patent applications. Its first patent ever was published in 1927. It filed its patents most often in Germany, France and United Kingdom. Its main competitors in its focus markets optics, thermal processes and audio-visual technology are SIRIUS KLEUREN FILM MIJ, BREWSTER PERCY DOUGLAS and PFENNINGER OTTO.

Patent filings in countries

World map showing TECH D OPTIQUE ET DE PHOTOGRAPs patent filings in countries
# Country Total Patents
#1 Germany 7
#2 France 7
#3 United Kingdom 7
#4 United States 5
#5 Canada 1

Patent filings per year

Chart showing TECH D OPTIQUE ET DE PHOTOGRAPs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Henri Chretien 4
#2 Chretien Henri 1
#3 Georges Chretien 1

Latest patents

Publication Filing date Title
GB356955A Improvements in and relating to anamorphotic lens systems
DE556576C Cinematographic film
GB349905A Improvements relating to the taking and projection of motion pictures and films therefor
US1962892A Anamorphotic lens system and method of making the same
GB334708A Improvements relating to the production of photographic prints
DE525608C Method and apparatus for making synthetic films
DE655189C Process for producing positive films which contain image and sound recordings on a common carrier
DE501419C Photographic copier
DE489976C Device for recording and reproducing photographic or cinematographic images
DE484943C Process for producing high-intensity photographic images
US1783998A Photographic reproduction objective with two diaphragms and its application as in printing positives for black and white cinematography, color cinematography, or cinematography in relief
US1838173A Process for obtaining highly luminous photographs
US1829633A Process for taking or projecting photographic or cinematographic panoramic views or views extending in height
GB286684A Improvements in optical systems for photographic copying
GB289454A Improvements in or relating to the taking and projection of cinematograph, and other images
GB283954A Improvements in methods and devices for the production of monochrome images on photographic films
DE529563C Multiple anamorphic lens
GB282078A Improvements relating to optical systems for use in photography
US1897752A Anamorphoser apparatus for cinematography in colors and in relief
CA285956A Photographic reproduction objective