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ASHWORTH WILLIAM J

Overview
  • Total Patents
    11
About

ASHWORTH WILLIAM J has a total of 11 patent applications. Its first patent ever was published in 1961. It filed its patents most often in United States and Canada. Its main competitors in its focus markets audio-visual technology, consumer goods and electrical machinery and energy are PICA SOUND INTERNAT, GN RESOUND NORTH AMERICA CORP and STANTON MAGNETICS.

Patent filings in countries

World map showing ASHWORTH WILLIAM Js patent filings in countries
# Country Total Patents
#1 United States 9
#2 Canada 2

Patent filings per year

Chart showing ASHWORTH WILLIAM Js patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Ashworth William J 11

Latest patents

Publication Filing date Title
US5287413A Dual voice coil sound reproducing device
US5031501A Method for attaching an audio transducer to a string musical instrument
US5058173A Combination inertia type audio transducer and loudspeaker
US4718098A Multi-diaphragm artificial reverberation device
US4151379A Electromagnetic speaker with bucking parallel high and low frequency coils drives sounding board and second diaphragm or external apparatus via magnetic coupling and having adjustable air gap and slot pole piece
US3925627A Transducer mounting to sounding board
US3358253A Self-adjusting relay
US3358084A Electromagnetic sound reproducer
US3174121A Electrical signal delay device
CA816895A Electro-magnet transducer
CA816793A Self adjusting relay