Patents by Inventor Charles D. Imperio

Charles D. Imperio 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).

  • Combined ratchet and torsion wrench
    Patent number: 4137801
    Abstract: A combined ratchet and torsion wrench which in the preferred embodiment includes a drop-in drive mechanism which is a separate, integral subassembly which can be dropped into a housing in the wrench head and a push-pull operable torsion shaft positioning mechanism slidable between shaft positions of engagement with and disengagement from the drive mechanism.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: February 6, 1979
    Inventor: Charles D. Imperio