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BARTHOLD FRED O

Overview
  • Total Patents
    25
  • GoodIP Patent Rank
    174,040
About

BARTHOLD FRED O has a total of 25 patent applications. Its first patent ever was published in 1964. It filed its patents most often in United States, China and WIPO (World Intellectual Property Organization). Its main competitors in its focus markets electrical machinery and energy, machines and audio-visual technology are INT POWER DEVICES INC, IDE OSAMU and PARK CHAN WOONG.

Patent filings per year

Chart showing BARTHOLD FRED Os patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Barthold Fred O 23

Latest patents

Publication Filing date Title
US2015194874A1 Harmonic displacement reduction
US2014340188A1 Planar core with high magnetic volume utilization
US2014300442A1 Planar core-type uniform external field equalizer and fabrication
US2009174376A1 DC-DC converter
AU1917495A Full wave buck boost power converter with buck power converter properties
CA2182263A1 Full wave buck boost power converter with buck power converter properties
US4734839A Source volt-ampere/load volt-ampere differential converter
US4042844A Power transistor switch
US3360710A Converter-alternating current or direct current to alternating current, with continuously variable adjustment of output frequency and voltage