Patents by Inventor Derek V. Doerr

Derek V. Doerr 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).

  • Saddle-joint jig
    Patent number: 5383282
    Abstract: A saddle-joint jig for reproducing the line of contact of the first tube in relation to a second tube so that the first tube, when cut along that line, may be joined in end-to-edge abutment to the second tube, in that same relation. The jig includes at least three generally parallel pins, each of which is slideably held to allow each pin to slide longitudinally when a force is applied thereto. The pins are held in a band that, in use, is capable of circumferentially enclosing the first tube.
    Type: Grant
    Filed: May 26, 1993
    Date of Patent: January 24, 1995
    Assignees: Robert W. Field, Gordon J. Kingston
    Inventors: Robert W. Field, Derek V. Doerr