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FRANCOIS JOSEPH GERARD VAN DEN

Overview
  • Total Patents
    46
About

FRANCOIS JOSEPH GERARD VAN DEN has a total of 46 patent applications. Its first patent ever was published in 1934. It filed its patents most often in United Kingdom. Its main competitors in its focus markets electrical machinery and energy, audio-visual technology and basic communication technologies are LEONARD FRANCIS BROADWAY, THOMSON TUBES & DISPLAYS and VIDEOCOLOR SPA.

Patent filings in countries

World map showing FRANCOIS JOSEPH GERARD VAN DENs patent filings in countries
# Country Total Patents
#1 United Kingdom 46

Patent filings per year

Chart showing FRANCOIS JOSEPH GERARD VAN DENs patent filings per year from 1900 to 2020

Latest patents

Publication Filing date Title
GB892641A Apparatus for electronic counting
GB760523A Electro-optical apparatus
GB619778A Improvements in or relating to triggering devices using gas-discharge tubes
GB567190A Improvements in or relating to electron discharge devices having light-sensitive cathodes
GB558109A Improvements in or relating to electron multipliers
GB558095A Improvements in or relating to electron multipliers
GB554829A An improved process for rendering brittle metals ductile
GB550856A Improvements in or relating to closure members for vacuum tubes
GB551498A Improvements in or relating to electron multipliers
GB550586A Improvements in or relating to electron multipliers
GB547801A Improvements in or relating to electron multiplier apparatus
GB547945A Improvements in or relating to electron discharge devices
GB547971A Improvements in or relating to electron discharge devices
GB562299A Improvements in or relating to electron multipliers
GB562300A Improvements in or relating to electron multipliers
GB543106A Improvements in electrodes for electron emission
GB545123A Improvements in or relating to electron multiplier apparatus
GB540893A Improvements in or relating to electron multipliers
GB540640A Improvements in or relating to electron multipliers
GB539662A Improvements in photo-electric devices