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HOWARD BUTLER LTD

Overview
  • Total Patents
    14
About

HOWARD BUTLER LTD has a total of 14 patent applications. Its first patent ever was published in 1943. It filed its patents most often in United Kingdom, Australia and Germany. Its main competitors in its focus markets measurement, electrical machinery and energy and mechanical elements are MODERNA WERKE A G, SENIS AG and LINCOLN METER COMPANY LTD.

Patent filings in countries

World map showing HOWARD BUTLER LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 11
#2 Australia 1
#3 Germany 1
#4 France 1

Patent filings per year

Chart showing HOWARD BUTLER LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Butler Howard 5
#2 Welch Trevor 1
#3 Butler Gordon 1

Latest patents

Publication Filing date Title
AU2008101105A4 Current Transformer
GB8322830D0 Temperature sensitive switch
GB873755A Improvements relating to housings for electrical measuring or indicating instruments
GB752108A Improvements relating to mounting arrangements for indicating or measuring instruments
GB702657A Improvements relating to measuring instruments
GB730471A Improvements relating to housings for measuring or indicating instruments
GB691862A Improvements in or relating to electrical measuring instruments
GB689492A Improvements in or relating to indicating, measuring or recording instruments
GB630404A Improvements in or relating to electrical indicating or measuring instruments
GB641649A Improvements in electrically-operated indicating and measuring instruments
GB597499A Improvements in moving iron electrical measuring instruments
GB573320A Improvements in electrical and other measuring instruments