Hard disk drive having a plurality of head disk assemblies

Head clogging detector for use in a video tape recorder

Head control for disc drive apparatuses, systems and processes

Head drum for a magnetic tape recorder

Head switch operations in a magnetic disk system

Head switch operations in a magnetic disk system

Head switch sequence to protect magneto-resistive (MR) head

Head switching control apparatus for use in a video signal proce

Head switching method and system using track number matching

Head switching method for staggered servo and circuit thereof

Head switching method for staggered servo and circuit thereof

Head switching operation utilizing an automatic dummy load

Head switching sequence in a disc drive employing head bias curr

Head switching sequence in a disc drive employing head bias...

Head switching signal producing circuit with compensation of a p

Helical scan type information recording device

Helical scan type information recording device for digital and a

High bandwidth data transfer to and from rotating data...

High speed recording and reproducing apparatus for avoiding cros