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BROWN HAROLD J

Overview
  • Total Patents
    17
About

BROWN HAROLD J has a total of 17 patent applications. Its first patent ever was published in 1932. It filed its patents most often in United States and Canada. Its main competitors in its focus markets electrical machinery and energy, measurement and control are SCHNEIDER ELECTRIC POWER DRIVES GMBH, QINGDAO HANQIN INTELLIGENT TECH CO LTD and MGE UPS SYSTEMS.

Patent filings in countries

World map showing BROWN HAROLD Js patent filings in countries
# Country Total Patents
#1 United States 16
#2 Canada 1

Patent filings per year

Chart showing BROWN HAROLD Js patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Brown Harold J 17
#2 Farrell George E 1

Latest patents

Publication Filing date Title
US3281716A Transistor power supply
US3139575A Controlled rectifier circuit
US3037159A Regulated power supply system
US2963643A Magnetic core tester
US2919408A Electronic watthour meter
US2710374A Decoupled filtration transformer converter system
US2783431A Decoupled converter system
US2711613A Wind actuated figure toy
US2754466A Protective converter systems
US2633560A Converter system
US2689280A Aperiodic vibrator
US2327578A Parallel operation of regulator interrupters
US2327576A Balanced interrupter circuit
US2327577A Balanced interrupter system
US2327575A Parallel operation of interrupting means
US2100319A Dental or surgical instrument
CA507684A Vibrator conversion system