Assignee
ARCHIVE CORP
US38 patents
Top patents by PatentIndex Score
US5253126AOct 12, 1993
Raw error monitoring and reporting
ARCHIVE CORP50 citations94
US5157564AOct 20, 1992
Storage module changer for a computer data storage drive
ARCHIVE CORP76 citations94
US5006819AApr 9, 1991
Track and hold phase locked loop circuit
ARCHIVE CORP66 citations94
US4833418AMay 23, 1989
Compensation circuit for nullifying differential offset voltage and regulating common mode voltage of differential signals
ARCHIVE CORP138 citations93
US5386545AJan 31, 1995
Target management method for data backup to a shared transfer station, multiple media element device
ARCHIVE CORP150 citations92
US5182687AJan 26, 1993
Method and apparatus for aligning cartridges with a cartridge insertion slot
ARCHIVE CORP48 citations92
US5050020ASep 17, 1991
Cartridge loader for loading each of a plurality of cartridges into a cartridge insertion slot
ARCHIVE CORP35 citations92
US4644420AFeb 17, 1987
Circuit and methodology for reading and tracking binary data from magnetic tape independently of the data pattern on the tape
ARCHIVE CORP39 citations92
US4466027AAug 14, 1984
Digital tape erasure conditioning system
ARCHIVE CORP27 citations92
US5285333AFeb 8, 1994
Mass storage and retrieval system for magnetic tape cartridges
ARCHIVE CORP70 citations91
US5163136ANov 10, 1992
System for assembling playback data frames using indexed frame buffer group according to logical frame numbers in valid subcode or frame header
ARCHIVE CORP50 citations91
US5109308AApr 28, 1992
Stationary head tape drive with a movable door opening mechanism
ARCHIVE CORP29 citations91
US5371636ADec 6, 1994
Mechanisms for a closed loop head positioner for streaming tape drives
ARCHIVE CORP49 citations90
US5255130AOct 19, 1993
Adjustable write equalization for tape drives
ARCHIVE CORP23 citations89
US5191492AMar 2, 1993
Mechanisms for a closed loop head positioner for streaming tape drives
ARCHIVE CORP46 citations89
US4858039AAug 15, 1989
Streaming tape drive with direct block addressability
ARCHIVE CORP32 citations87
US5257091AOct 26, 1993
Optical alignment system for aligning a multiple gap tape head assembly
ARCHIVE CORP21 citations84
US5101311AMar 31, 1992
Tape and mechanism protection methods for DAT drives
ARCHIVE CORP20 citations81
US4414593ANov 8, 1983
Streaming cartridge tape drive
ARCHIVE CORP24 citations81
US4978955ADec 18, 1990
Data randomizing/de-randomizing circuit for randomizing and de-randomizing data
ARCHIVE CORP21 citations80
US4717866AJan 5, 1988
Stepping motor excitation sequences
ARCHIVE CORP7 citations73
US5381292AJan 10, 1995
Method for self-cleaning dat drive tape heads
ARCHIVE CORP15 citations72
US5237469AAug 17, 1993
Stationary head cartridge tape drive with moveable x-y table and method
ARCHIVE CORP19 citations72
US5218487AJun 8, 1993
Audio tape operation on a DAT data storage drive
ARCHIVE CORP9 citations72
US5198947AMar 30, 1993
Apparatus for adjusting a tape head for a magnetic tape
ARCHIVE CORP9 citations72
US5122916AJun 16, 1992
Electromagnetic head having interference compensation circuitry
ARCHIVE CORP9 citations72
US5081547AJan 14, 1992
Apparatus and method for automatic adjustment of read amplitude threshold in a digital tape drive
ARCHIVE CORP17 citations72
US5001580AMar 19, 1991
Method to compensate for tape slope and head azimuth errors
ARCHIVE CORP17 citations72
US5218501AJun 8, 1993
Device for aligning magnetic tape to a read-write head
ARCHIVE CORP8 citations71
US5267096ANov 30, 1993
Adjustable write equalization for tape drives
ARCHIVE CORP15 citations70
US4833558AMay 23, 1989
Head positioning assembly
ARCHIVE CORP20 citations69
US5172280ADec 15, 1992
Apparatus and method for automatic write current calibration in a streaming tape drive
ARCHIVE CORP15 citations68
US4747004AMay 24, 1988
Magnetic head positioning apparatus
ARCHIVE CORP15 citations68
US5327059AJul 5, 1994
Tape drive capstan motor servo system with static friction compensation
ARCHIVE CORP11 citations66
US4837643AJun 6, 1989
Circuit for controlling frequency and phase of voltage controlled oscillator in a data smoother for a streaming cartridge tape drive
ARCHIVE CORP11 citations66
US5375224ADec 20, 1994
Raw data reader
ARCHIVE CORP16 citations60
US4963810AOct 16, 1990
Variable load motor drive control
ARCHIVE CORP10 citations59
US4816932AMar 28, 1989
Circuit for providing a symmetric current to the head of a magnetic recording device
ARCHIVE CORP8 citations58