Patents by Inventor Robert D. Colby

Robert D. Colby 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).

  • Disposable bowling shoe
    Patent number: 4120103
    Abstract: This shoe consists primarily of a toe portion, a heel portion, and an adjustable arch, which, when the shoe is assembled, will be held in place by pointed plastic tabs on inner sole portions, when pressure is applied. The shoe further includes toothed tongues of the heel portion, which are received in toothed pockets in the toe portion, and strap means on the heel portion provides fastening means to the toe portion by buckles thereon.
    Type: Grant
    Filed: September 22, 1977
    Date of Patent: October 17, 1978
    Inventor: Robert D. Colby