Patents by Inventor Kenneth E. Calvert

Kenneth E. Calvert 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).

  • Tape measure deployment aid
    Patent number: 5425181
    Abstract: This invention pertains to a tape measure deployment aid for measuring roof surfaces. The deployment device described by this invention consists of a roller that rotates freely on an axle which is connected to a yoke and then attached with linkage fasteners to a tape measure. This invention also includes two methods of using the tape measure deployment aid.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: June 20, 1995
    Inventor: Kenneth E. Calvert