Patents by Inventor Robert F. Gilman

Robert F. Gilman 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).

  • Improved method and apparatus for detecting and locating residually magnetized items
    Patent number: 4527123
    Abstract: Methods and apparatus for detecting and locating residually magnetized misplaced tools and the like are disclosed. A sensitive gradiometer having a hand-held probe provides a balanced, phase cancelling magnetic field. The presence of a weak residual mangetic field emanating from the misplaced tool upsets the balance of the generated field, and this imbalance provides an audio signal which is used to locate the tool.
    Type: Grant
    Filed: July 8, 1980
    Date of Patent: July 2, 1985
    Assignee: Sentronic of California Incorporated
    Inventors: Robert F. Gilman, Claude R. Schwarz