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POLYGRAM INT HOLDING

Overview
  • Total Patents
    73
About

POLYGRAM INT HOLDING has a total of 73 patent applications. Its first patent ever was published in 1986. It filed its patents most often in Japan, United States and EPO (European Patent Office). Its main competitors in its focus markets audio-visual technology, machines and chemical engineering are GELARDI PAUL J, MAHNAD FARAMARZ and TAKAZAWA KOJI.

Patent filings per year

Chart showing POLYGRAM INT HOLDINGs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Duurland Jozef Maria 7
#2 Benne Karsten 7
#3 Roering Johannes Jacobus 7
#4 Koop Hermann 7
#5 Roering Johannes J 7
#6 Duurland Jozef M 6
#7 Schueddekopf Hans 5
#8 Grobecker Hermann 4
#9 Mestdagh Gilbert E 3
#10 Vollmann Norbert Christian 3

Latest patents

Publication Filing date Title
SG118493G Copying apparatus for copying a magnetic pattern from a master magnetic tape on a duplicate magnetic tape and method of operating such a copying apparatus.
JPH0620275A Manufacture of duplicating magnetic playback medium, duplicating device for above manufacture and magnetic duplicating head
JPH08274654A Information transmission system
JPH05205363A Manufacture of previously recorded magnetic tape and magnetic tape device
EP0527533A2 Method of manufacturing a prerecorded magnetic tape, and magnetic-tape apparatus suitable for carrying out the method
CA2067879A1 Prerecorded cassette for a system for magnetically recording/reproducing signals
NL9001038A Method and apparatus for obtaining pre-played digital music kassettes
NL8801482A Compact disc packaging unit - has two different-sized connected sleeves
NL8701681A Apparatus for recording and transporting an elongated endless belt, and method for copying magnetic tapes using such a device.
NL8701477A Copier for copying a magnetic cartridge from a mother magnetic band on a copy magnetic band and method for operating such copier.
NL8701279A Combination of magnetic tape cassette equipment, provided with a loading device, and a magnetic tape cassette, and magnetic tape cassette apparatus of such combination.
EP0229419A1 Storage case for a magnetic-tape cassette
US4681280A Magnetic-tape cassette with stretched liner arrangement