Patents by Inventor Daniel W. Grifford

Daniel W. Grifford 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).

  • Combination chuck key tool
    Patent number: 4467677
    Abstract: A combination tool includes at least two chuck keys, each chuck key being individually borne on the end of a tool shaft or arm. The combination tool can also include other tool instrumentalities such as screwdrivers. Preferably, the tool comprises a pair of perpendicular tool shafts, having four chuck keys of different sizes disposed one each on the four free ends of the two shafts.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: August 28, 1984
    Inventor: Daniel W. Grifford