Patents by Inventor Glenn E. Fryer

Glenn E. Fryer 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).

  • Tunnel measuring apparatus and method
    Patent number: 4888720
    Abstract: Apparatus and method for automatically measuring the interior dimensions of tunnels. The apparatus is mounted on an inspection vehicle and comprises a plurality of ultrasonic transducers which are arranged to form an imaginary template a predetermined distance from the tunnel wall. The transducers are periodically operated by a computer to derive measurement information as the inspection vehicle moves through the tunnel. The results of each measurement are stored by the computer for subsequent analysis.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: December 19, 1989
    Inventor: Glenn E. Fryer