Patents by Inventor Barry M. Marks

Barry M. Marks 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).

  • Electronic marker device and method of making same
    Patent number: 4334227
    Abstract: Passive type electronic marker device is hoop shaped, with the hoop thickness in the radial direction being substantially less than the hoop width in the axial direction and with a tuned circuit disposed within the hoop. Improved structure and the method involves a mandrel portion on which the tuned circuit coil is wound, a mating cover band, and special peripheral hermetic seals.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: June 8, 1982
    Assignee: A.P.C. Industries, Inc.
    Inventor: Barry M. Marks
  • Electronic marker for buried utilities
    Patent number: D269664
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: July 12, 1983
    Assignee: A.P.C. Industries, Inc.
    Inventor: Barry M. Marks