Patents by Inventor Claude Day

Claude Day 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).

  • Nail head drilling guide
    Patent number: 4256420
    Abstract: A guide for locating and supporting a drill bit while drilling out the heads of nails which support rigid asbestos siding shingles. The guide is positioned by contact with an edge of a shingle. A number of drill guide holes is provided in the guide, and each hole has a countersunk portion of different diameter so as to accomodate different sizes of nail heads.
    Type: Grant
    Filed: January 22, 1979
    Date of Patent: March 17, 1981
    Inventor: Claude Day