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ADVANCE TRANSFORMER CO

Overview
  • Total Patents
    220
About

ADVANCE TRANSFORMER CO has a total of 220 patent applications. Its first patent ever was published in 1945. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets electrical machinery and energy, machines and basic communication technologies are AUGIER ETS, HELVAR OY and BOUCHER INV S LTD.

Patent filings in countries

World map showing ADVANCE TRANSFORMER COs patent filings in countries

Patent filings per year

Chart showing ADVANCE TRANSFORMER COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Feinberg Albert E 86
#2 Crawford Joseph A 10
#3 Berger Paul 10
#4 Paul Berger 10
#5 Wisbey Robert W 9
#6 Droho Joseph S 8
#7 Sulzer Robert I 8
#8 Droho Joseph Steven 7
#9 Wisbey Robert William 5
#10 Baran Joseph G 5

Latest patents

Publication Filing date Title
US4876486A Two-lead starter circuit for a gaseous discharge lamp
US4939430A Ignitor circuit for discharge lamps with novel ballast
US4729088A Regulated high frequency power supply
US4791529A Protected potted metallized film capacitor
US4714979A Protected potted metallized film capacitor
US4740861A Thermal protection device for a dual input voltage lamp transformer/ballast apparatus
US4740731A Two capacitor apparatus for sequential starting and operation of multiple series connected discharge lamps
CA1333408C Electronic ballast circuit for fluorescent lamps
US4695771A Ignition circuit for high pressure arc discharge lamps
US4642521A Compact igniter for discharge lamps
CA1224521A Rapid start fluorescent lamp circuits with disconnect sockets
US4593231A Three-way fluorescent lamp device
US4847535A Hybrid ballast for multiple discharge lamps
US4565415A Socket for fluorescent lamps
US4568860A Rapid start fluorescent lamp circuits with disconnect sockets
US4517498A Sequence start lamp ballast with current spike suppression means
US4406976A Discharge lamp ballast circuit
CA1145388A Series sequence fluorescent ballast with multiple lighting levels
CA1111967A Energizing circuit for magnetron using dual transformer secondaries
US4356431A Magnetron energizing circuit