Patents by Inventor Haik Marcar

Haik Marcar 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).

  • Manufacture of homogeneous magnetic recording structure
    Patent number: 4459253
    Abstract: A new magnetic medium permits magnetic recording either in the longitudinal or the vertical direction. The medium, unlike prior art structures, does not require a nonmagnetic substrate. The medium is a rigid magnetic disk homogeneously prepared from ferric oxide particles and polyethersulfone in ratios and proportions that produce effective and inexpensive magnetic recording media.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: July 10, 1984
    Assignee: International Business Machines Corporation
    Inventors: Haik Marcar, Hans Traeg