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JOHN FREDERICK ZWICKY

Overview
  • Total Patents
    23
About

JOHN FREDERICK ZWICKY has a total of 23 patent applications. Its first patent ever was published in 1940. It filed its patents most often in United Kingdom. Its main competitors in its focus markets chemical engineering, measurement and environmental technology are LAUTENSCHLAEGER WERNER, VYZK USTAV CHEM ZARIZENI and PARMENTIER FRANCOIS.

Patent filings in countries

World map showing JOHN FREDERICK ZWICKYs patent filings in countries
# Country Total Patents
#1 United Kingdom 23

Patent filings per year

Chart showing JOHN FREDERICK ZWICKYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Cheyne Robert Douglas 1

Latest patents

Publication Filing date Title
GB980335A Improvements relating to ion-exchange apparatus
GB981408A Improvements relating to ion-exchange columns
GB980255A Improvements relating to ion-exchange apparatus
GB970168A Improvements relating to apparatus for the treatment of water
GB890285A Improvements relating to the mixing of liquids
GB882254A Improvements relating to monobed ion-exchange methods and apparatus
GB881772A Improvements in or relating to ion-exchange water treatment
GB882362A Improvements in or relating to fluid-treatment apparatus
GB828368A Apparatus
GB819495A Improvements in or relating to liquid filtering and treatment devices
GB797835A Improvements relating to gas-detecting apparatus
GB792800A Improvements in or relating to devices for filtering or distributing liquids and gases
GB761159A Improvements in or relating to fluid-treatment apparatus
GB761388A Improvements in or relating to liquid treatment devices
GB641197A Improvements in or relating to apparatus for dispensing liquids by weight
GB623523A Improvements in or relating to hydraulic jacking systems for vehicles
GB598574A Improvements in or relating to filtering devices
GB564366A Improvements in or relating to devices for the hydraulic pressure testing of vesselsand the like
GB564899A Improvements in or relating to reciprocating pumps for the hydraulic pressure testing of vessels and the like
GB564486A Improvements in or relating to devices for the local testing of welded joints and the like