Patents by Inventor John A. Danen

John A. Danen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Identification field scan apparatus
    Patent number: 4504873
    Abstract: A multiple transducer disk file format and head addressing/switching control circuitry is shown and described which permits reading all sector identifier (ID) fields during a single rotation of the media using uniformly staggered sectors. This results in an average access latency of one-half revolution of the media and enables the use of maximum or selectively reduced data rates secured by successively storing data in sectors separated by sector fractions which are multiples of the uniform staggering between sectors within a cylinder.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: March 12, 1985
    Assignee: International Business Machines Corporation
    Inventors: Peter B. Bandy, John A. Danen, Nyles N. Heise, Donald C. Holtan