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BIRMINGHAM SOUND REPRODUCERS

Overview
  • Total Patents
    56
About

BIRMINGHAM SOUND REPRODUCERS has a total of 56 patent applications. Its first patent ever was published in 1948. It filed its patents most often in United Kingdom, United States and Germany. Its main competitors in its focus markets audio-visual technology, electrical machinery and energy and macromolecular chemistry and polymers are VM CORP, KONDO TETSUYA and PERPETUUM EBNER KG.

Patent filings in countries

World map showing BIRMINGHAM SOUND REPRODUCERSs patent filings in countries
# Country Total Patents
#1 United Kingdom 23
#2 United States 10
#3 Germany 8
#4 France 7
#5 Canada 6
#6 Belgium 2

Patent filings per year

Chart showing BIRMINGHAM SOUND REPRODUCERSs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Guest Lawrence Vincent 24
#2 Vincent Guest Lawrence 9
#3 Guest Lawrence V 5
#4 Lane Norman 4
#5 Walker Ronald 1
#6 Shepherd Percy Victor 1

Latest patents

Publication Filing date Title
US3085759A Magnetic tape recorder and reproducer
GB904722A Improvements in and relating to sound recording and reproducing apparatus of the kind utilising a magnetic tape record
GB904255A Improvements in and relating to sound record reproducing apparatus using disc records
GB904721A Improvements in and relating to sound recording and playback apparatus of the kind utilising a magnetic tape record
GB890487A Improvements in and relating to sound recording and playback apparatus of the kind utilising a magnetic tape record
GB876276A Improvements in and relating to sound recording and playback apparatus using magnetic record tapes
DE1120734B Centering device for playing records
US2977815A Change-speed mechanism for the turntable of a disc talking machine
US3034795A Adaptor for use with disc talking machines
GB866351A Improvements in and relating to tape recording and reproducing apparatus
DE1086058B Stacking axis
US3000637A Record supporting and releasing spindle for automatic talking machines
GB852657A Improved change-speed mechanism for the turntable of a disc talking machine
GB839518A An adaptor for use with disc talking machines
GB839666A Improvements in and relating to automatic talking machines
US3049354A Sound reproducing apparatus
DE1076956B Device for record changer for coupling the changing mechanism with the turntable shaft
GB823670A Improved record supporting and releasing spindle for automatic talking machines
GB818203A Improved record supporting and releasing spindle for automatic talking machines
DE1117316B Record changer