JVC Victor Company of Japan, Ltd.
20Patents
0Active
20Granted
30Portfolio score
Filing activity: Jun 15, 1994 → Oct 28, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| 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.