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ROLA COMPANY INC

Overview
  • Total Patents
    11
About

ROLA COMPANY INC has a total of 11 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 audio-visual technology and machines are MEISEI SANGYO KK, RYCOTE MICROPHONE WINDSHIELDS and WILSON DAVID A.

Patent filings in countries

World map showing ROLA COMPANY INCs patent filings in countries
# Country Total Patents
#1 United States 9
#2 Canada 1
#3 United Kingdom 1

Patent filings per year

Chart showing ROLA COMPANY INCs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Audio-visual technology
#2 Machines

Top inventors

# Name Total Patents
#1 Perry Charles A 4
#2 Russell Earl L 2
#3 Smith Francis Bradford 1
#4 Engholm Beatrice H 1
#5 Smith Francis B 1
#6 Fulvio Levi 1
#7 Engholm Bernard A 1

Latest patents

Publication Filing date Title
US2949663A Method of assembly of a loud speaker
US2950359A Loud speaker assembly
US2770681A Loud-speaker
US2681390A Diaphragm for loud speakers
US2666980A Method of making loud-speakers
US2517727A Permanent magnet structure for electrodynamic loud-speakers
US2524836A Permanent magnet electrodynamic loud-speaker
US2565069A Loud-speaker of the double diaphragm type
US2524780A Pole piece centering arrangement for permanent magnet electrodynamic loudspeakers
CA589109A Loud speaker