Patents by Inventor Anthony H. Sparkes

Anthony H. Sparkes 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).

  • Lockable ring binder mechanism
    Patent number: 5255991
    Abstract: A ring binder locking mechanism has a pair of toggle blades abutting edge to edge with one another within an elongate spring housing. A booster trigger is mounted at each end of the housing for locking the blades and their half rings in a closed position. The trigger is of one-piece metal construction and includes a pair of locking arms engagable with the blades to lock them with the half rings closed.
    Type: Grant
    Filed: March 31, 1992
    Date of Patent: October 26, 1993
    Assignee: Bensons International Systems Limited
    Inventor: Anthony H. Sparkes