| Patent No. | Patent Title: |
| 4926273 | Apparatus and method for recording and reproducing information si... |
| 4914532 | Method of efficiently erasing data in accordance with type of mag... |
| 4907103 | Low CnO2 loading, high coercivity thermomagnetic tape ... |
| 4882639 | Changeover writing circuit for magnetic disk apparatus operable a... |
| 4882638 | PCM recording and reproducing apparatus having common data frame ... |
| 4882637 | Copying apparatus for copying a magnetic pattern from a master ma... |
| 4881136 | Method and apparatus for detecting minute defects on magnetic dis... |
| 4879609 | Rotary head type recording apparatus having an erasing function b... |
| 4875112 | Compound pulse dimming circuitry for conditioning readback signal... |
| 4868922 | Data modulation/demodulation system utilizing demodulation clocks... |
| 4864432 | Signal monitoring system with failsafe back-up capability |
| 4864431 | Tape dubbing apparatus in which each of a plurality of slave reco... |
| 4862295 | Method of formatting a storage medium and drive unit for controll... |
| 4860128 | Recordable data device having identification symbols formed there... |
| 4860127 | Magnetic disk cartridge with erasure-preventing device |
| 4845574 | Apparatus for recording and reproducing digital signals on magnet... |
| 4843492 | Automatic cassette tape recorder stop mechanism for use with a pl... |
| 4839749 | Recorded voice warning system for providing safety alerts and per... |
| 4837643 | Circuit for controlling frequency and phase of voltage controlled... |
| 4835759 | Method and apparatus for compensating variation of read data in a... |
| 4833663 | Information recording/reproducing apparatus for handling defectiv... |
| 4827360 | Rotary transformer with winding to cancel crosstalk |
| 4823207 | PCM recording and playback with variable read and write speeds |
| 4821125 | Compensation of write current adn delta-V for recording component... |
| 4821127 | Demagnetizing apparatus for erasing signals recorded on concentri... |
| 4819097 | Audio signal recording/reproducing system for use in time-lapse v... |
| 4816932 | Circuit for providing a symmetric current to the head of a magnet... |
| 4816926 | Rotary head digital audio tape recorder with multiple recording m... |
| 4811125 | Information recording/regenerating circuit for a memory unit |
| 4805047 | Read/write magnetic disk apparatus operable in plural density mod... |
| 4805043 | Microgap recording using ferrimagnetic medium for magneto-optic p... |
| 4805046 | Information recording and reproducing apparatus using sectors div... |
| 4802038 | PCM audio signal recording and/or reproducing apparatus with prog... |
| 4799115 | Method and apparatus for tolerating track misregistration systems... |
| 4797753 | Monitor for visually indicating wear on record media |
| 4797755 | System and method for transferring data between a plurality of di... |
| 4786993 | Voltage amplifier for constant voltage biasing and amplifying sig... |
| 4777545 | Circuit arrangement for inhibiting writing on a magnetic disk dur... |
| 4775900 | Apparatus for encoding an NRZ digital signal as a BRZ synchronous... |
| 4772963 | Duplicate digital date recording apparatus for enhancing bit erro... |
Bizarre Patents 
PatentStorm News
