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WIDMAYER DON F

Overview
  • Total Patents
    12
About

WIDMAYER DON F has a total of 12 patent applications. Its first patent ever was published in 1972. It filed its patents most often in Canada, EPO (European Patent Office) and United States. Its main competitors in its focus markets electrical machinery and energy, environmental technology and machines are ELECTRONIC LIGHTING INC, ARENA OCHOA GUIDO and NICOLLET TECHNOLOGIES CORP.

Patent filings in countries

World map showing WIDMAYER DON Fs patent filings in countries
# Country Total Patents
#1 Canada 7
#2 EPO (European Patent Office) 3
#3 United States 2

Patent filings per year

Chart showing WIDMAYER DON Fs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Widmayer Don F 12

Latest patents

Publication Filing date Title
CA1265576A Transient control circuit for fluorescent lamp systems
US4766352A Method and apparatus for starting and operating fluorescent lamp and auxiliary ballast systems at reduced power levels
EP0200827A1 Control of AC power to inductive loads
CA1257901A Control of ac power for inductive loads
US4642525A Transient control circuit for fluorescent lamp systems
CA1128604A Energy conserving automatic light output system
CA1025665A Plant growth method and apparatus
CA1014740A Plant growth method and apparatus
CA1006586A Plant growth system
CA853327A Electric current control apparatus