Patents by Inventor Bruce W. Cotterman

Bruce W. Cotterman 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).

  • Instructional polariscope
    Patent number: H76
    Abstract: An instructional polariscope which is easily disassembled, reassembled, cbrated and operated in the classroom by individual students for the purposes of teaching and demonstrating the interoperation of components of a polariscope and the principles of photoelasticity. This polariscope can be assembled for use as either a plane or a circular polariscope and employs a reflector which allows use of an external light source.
    Type: Grant
    Filed: February 10, 1983
    Date of Patent: July 1, 1986
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Bruce W. Cotterman