Patent assignee · JP · COMPANY

JVC Victor Company of Japan, Ltd.

20Patents
0Active
20Granted
30Portfolio score

Filing activity: Jun 15, 1994 → Oct 28, 2003

Most-cited patents

PatentTitleAreaCited byStatus
US5620755A Inducing tilted perpendicular alignment in liquid crystals Emerging Cross-Sectional Technologies 40 Expired
US6894710B2 Card recording apparatus Performing Operations; Transporting 15 Expired
US6587135B1 Card recording apparatus Performing Operations; Transporting 14 Expired
US6560497B2 METHOD FOR PROCESSING AND REPRODUCING AUDIO SIGNAL AT DESIRED SOUND QUALITY, REDUCED DATA VOLUME OR ADJUSTED OUTPUT LEVEL, APPARATUS FOR PROCESSING AUDIO SIGNAL WITH SOUND QUALITY CONTROL INFORMATION OR TEST TONE SIGNAL OR AT REDUCED DATA VOLUME, RECORDING MEDIUM FOR RECORDING AUDIO SIGNAL WITH SOUND QUALITY CONTROL INFORMATION OR TEST TONE SIGNAL OR AT REDUCED DATA VOLUME, AND APPARATUS FOR REPRODUCING AUDIO SIGNAL AT DESIRED SOUND QUALITY, REDUCED DATA VOLUME OR ADJUSTED OUTPUT LEVEL Electricity 12 Expired
US6914874B2 DISKLIKE RECORDING MEDIA, A METHOD FOR DETECTING FORGED DISKS, AN ANTI-FORGERY SYSTEM FOR PERFORMING A TRUE-FALSE JUDGEMENT BASED ON INFORMATION COLLECTED FROM THE RECORDING MEDIA, AND A MANUFACTURING APPARATUS FOR RECORDING INFORMATION IN THE DISKS Physics 10 Expired
US6618551B1 Encoding apparatus of audio signal, audio disc and disc reproducing apparatus Physics 9 Expired
US7020780B1 Method apparatus and systems for producing and writing cipher keys, reproducing information with a cipher key, and for permitting reproduction of information with a cipher key, and permitting reproduction of information with a cipher key, and optical disc recorded with a cipher key Physics 7 Expired
US6676791B1 Multilayered optical information-recording media and process for manufacture thereof Emerging Cross-Sectional Technologies 7 Expired
US6546502B1 Information recording method and apparatus of optical disc Physics 7 Expired
US6690430B1 Chrominance signal demodulation circuit Electricity 6 Expired
US6707640B2 Rotary medium driving apparatus Physics 6 Expired
US6763275B2 METHOD FOR PROCESSING AND REPRODUCING AUDIO SIGNAL AT DESIRED SOUND QUALITY, REDUCED DATA VOLUME OR ADJUSTED OUTPUT LEVEL, APPARATUS FOR PROCESSING AUDIO SIGNAL WITH SOUND QUALITY CONTROL INFORMATION OR TEST TONE SIGNAL OR AT REDUCED DATA VOLUME, RECORDING MEDIUM FOR RECORDING AUDIO SIGNAL WITH SOUND QUALITY CONTROL INFORMATION OR TEST TONE SIGNAL OR AT REDUCED DATA VOLUME, AND APPARATUS FOR REPRODUCING AUDIO SIGNAL AT DESIRED SOUND QUALITY, REDUCED DATA VOLUME OR ADJUSTED OUTPUT LEVEL Electricity 5 Expired
US6633533B2 Optically detectable information recording medium with limited root mean square roughness R &sgr; Emerging Cross-Sectional Technologies 4 Expired
US6934241B2 Information recording medium Emerging Cross-Sectional Technologies 3 Expired
US6861126B2 Magnetic recording medium possessing a magnetic layer having plural oxygen-containing regions Emerging Cross-Sectional Technologies 3 Expired
US6953154B2 Card recording apparatus Performing Operations; Transporting 2 Expired
US6652998B2 Producing method of thin film magnetic tape and the thin film magnetic tape Emerging Cross-Sectional Technologies 2 Expired
US6973021B2 Multilayered optical information-recording media and process for manufacture thereof Emerging Cross-Sectional Technologies 2 Expired
US6725111B2 METHOD FOR PROCESSING AND REPRODUCING AUDIO SIGNAL AT DESIRED SOUND QUALITY, REDUCED DATA VOLUME OR ADJUSTED OUTPUT LEVEL, APPARATUS FOR PROCESSING AUDIO SIGNAL WITH SOUND QUALITY CONTROL INFORMATION OR TEST TONE SIGNAL OR AT REDUCED DATA VOLUME, RECORDING MEDIUM FOR RECORDING AUDIO SIGNAL WITH SOUND QUALITY CONTROL INFORMATION OR TEST TONE SIGNAL OR AT REDUCED DATA VOLUME, AND APPARATUS FOR REPRODUCING AUDIO SIGNAL AT DESIRED SOUND QUALITY, REDUCED DATA VOLUME OR ADJUSTED OUTPUT LEVEL Electricity 1 Expired
US7248787B2 Encoding apparatus of audio signal, audio disc and disc reproducing apparatus Physics 0 Expired

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.