Safeguarding of data recorded on disk by tunnel erase...

Sampled data positioning system employing a model of the...

Sampled servo code format and system for a disc drive

Scan control for synchronizing a data signal with a clock...

Scanning and error checking apparatus for address...

Scanning apparatus and method

Scanning element

Scanning head for an optical disc system

Scanning light beam of changing size

Scanning reproducing apparatus for disc type video records

Scanning tunnel-current-detecting device and method for...

Seat for a cassette memory

Secondary storage facility with serial transfer of control...

Sector architecture of fixed block disk drive

Sector identification method for hard sectored hard files

Sector mark decoder for an optical recorder

Sectored servo independent of data architecture

Sectorized data path following servo system

Secure digital recording

Secure property document and method of manufacture