Patents by Inventor Billy J. Doolittle

Billy J. Doolittle 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).

  • Loose leaf binder
    Patent number: 4011018
    Abstract: A linking arms mechanism for a prong type loose-leaf paper binder having spacer bars with recessed portions within which curved spaced prongs are fixed and integral raised shear stops are formed which cooperate with a hinge assembly.
    Type: Grant
    Filed: September 10, 1975
    Date of Patent: March 8, 1977
    Assignee: Royal Business Machines, Inc.
    Inventor: Billy J. Doolittle