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ERNST BERTRAM

Overview
  • Total Patents
    12
About

ERNST BERTRAM has a total of 12 patent applications. Its first patent ever was published in 1930. It filed its patents most often in United Kingdom and United States. Its main competitors in its focus markets optics, measurement and basic communication technologies are BERTRAM FAB ERNST & WILHELM, CARLSON CO CHESLEY F and EUMIG ELEK ZITATS UND METALLWA.

Patent filings in countries

World map showing ERNST BERTRAMs patent filings in countries
# Country Total Patents
#1 United Kingdom 11
#2 United States 1

Patent filings per year

Chart showing ERNST BERTRAMs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Ernst Bertram 1

Latest patents

Publication Filing date Title
GB1013409A Improvements in photographic exposure meters
GB1006038A Improvements in tuning or volume indicators for electronic apparatus
GB899782A Improvements in or relating to photographic cameras diaphragm aperture selecting devices
GB728867A Improved focussing device for photographic cameras
GB742599A Improvements in photographic cameras
US1931883A Photographic exposure-meter