Learn more

VM CORP

Overview
  • Total Patents
    221
About

VM CORP has a total of 221 patent applications. Its first patent ever was published in 1950. It filed its patents most often in United States, United Kingdom and Canada. Its main competitors in its focus markets audio-visual technology, electrical machinery and energy and optics are KONDO TETSUYA, STAAR SA and TAPE AUTOMATION LTD.

Patent filings in countries

World map showing VM CORPs patent filings in countries
# Country Total Patents
#1 United States 115
#2 United Kingdom 30
#3 Canada 27
#4 Germany 27
#5 Switzerland 10
#6 France 5
#7 Norway 4
#8 Sweden 2
#9 Argentina 1

Patent filings per year

Chart showing VM CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hammond Robert J 26
#2 Freier Gerald H 25
#3 Morrison James L D 19
#4 Estkowski Michael H 12
#5 Rhoades Robert B 11
#6 Faulkner Willard J 10
#7 Antwerp Robert L Van 8
#8 Simpson Richard W 8
#9 Rankin John A 8
#10 Freathy Ralph E 6

Latest patents

Publication Filing date Title
US4166226A No-back synchronous motor drive
US3975652A No-back control for a permanent magnet rotor motor
US3838859A Speed shift for a phonograph player drive
US3838861A Disc search unit
US3741499A Clutch arrangement for tape transport
US3759531A Record changer spindle
US3717350A Cueing means for record player
US3682485A Phonograph tone arm
US3588121A Record changer spindle
US3552816A Portable phonograph record player
US3572866A Portable phonograph record player
US3564478A Electrical connector and ground structure
US3553080A Circuitry for recording and reproducing video signal information as multiple limited bandwidth signals
US3442514A Record changer spindle
DE1279952B Attachment axis for records with a large center hole on a stacking axis for records with a small center hole
US3507503A Record player
US3594009A Automatic record reproducer apparatus
US3545766A Tape recorder controls
US3547446A Portable tape recorder with a single finger-actuated control knob
US3506270A Electrical phonograph velocity trip mechanism