Patents by Inventor John D. Holm

John D. Holm 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).

  • Magnetic recording medium having binder-free phosphide coating
    Patent number: 3973072
    Abstract: Magnetic recording medium having a binder-free magnetizable coating of M.sub.2 P where M consists essentially of a combination of at least two transition metals, preferably iron, nickel and/or cobalt, which medium has high coercivity and low Curie temperature, making it especially useful as an intermediate transfer medium for thermoremanent contact duplication.
    Type: Grant
    Filed: February 20, 1973
    Date of Patent: August 3, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gerald S. Anderson, John D. Holm, Richard L. Jacobson, Ronald E. Smith