Learn more

FRIEDRICH LIERG

Overview
  • Total Patents
    16
About

FRIEDRICH LIERG has a total of 16 patent applications. Its first patent ever was published in 1926. It filed its patents most often in United Kingdom and United States. Its main competitors in its focus markets optics, textiles and paper and machines are FUJI HUNT PHOTO CHEM, CIE D EXPL DES PROCEDES DE PHO and SCOTT GRAPHICS.

Patent filings in countries

World map showing FRIEDRICH LIERGs patent filings in countries
# Country Total Patents
#1 United Kingdom 10
#2 United States 6

Patent filings per year

Chart showing FRIEDRICH LIERGs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Friedrich Lierg 6

Latest patents

Publication Filing date Title
GB874725A Improvements in or relating to letterpress printing on plastics
US2312499A Planographic printing form
US2305169A Process of producing sensitive silver halide-colloidal aggregates
US2036945A Process for the production of colored pictures, particularly in natural colors on paper, films, and the like
GB353819A An improved process for producing mono- or multi-coloured prints
GB345311A An improved method of imparting printing capability to photographic images in emulsions which are excessively poor in silver
GB344365A Improvements in and relating to processes and apparatus for producing multicoloured prints
GB333361A Process of chemically transforming photographic silver images
GB334004A Process of producing photographs and kinematographic films in natural colours
GB335930A Improvements in or relating to the mordanting of photographic silver images
GB333697A Process of producing films in natural colours by a single exposure
US1958830A Process of producing photographs and cinematographic films in natural colors
US1758572A Process of producing pictures consisting of dyes in photographic manner
GB245470A Process of producing kinematographic pictures in natural colours