1
David M Lounsbury, Alexander J Stevenson: Digital data error correction method and apparatus. Prime Computer, Wolf Greenfield & Sacks, January 13, 1987: US04637023 (46 worldwide citation)

Controller circuitry for a serially-recording magnetic tape drive which is capable of correcting writing errors by rewriting the portions of the data which have been erroneously recorded. Write circuitry in the controller breaks a conventional data record up into one or more blockettes, each of whic ...


2
Alexander J Stevenson, David M Lounsbury: Magnetic tape drive controller utilizing dual DMA controllers. Prime Computer, Wolf Greenfield & Sacks, August 25, 1987: US04689767 (10 worldwide citation)

A controller for use with a magnetic tape drive which has a plurality of buffer memories for temporarily storing data that is passed between the tape drive and a host computer system. Temporary storage of data within the tape controller allows data to be rewritten on the tape if the initial writing ...


3
Charles C Long, David M Lounsbury, Richard R Curtin: Apparatus for decoding phase encoded data. Prime Computer, Wolf Greenfield & Sacks, July 30, 1985: US04532559 (7 worldwide citation)

Apparatus is disclosed for reading phase encoded digital data from a nine-track magnetic tape which apparatus includes timing circuitry for deriving a clock signal from the recorded data. A portion of the timing circuitry is associated with each track on the tape and automatically accommodates, with ...