Patents by Inventor Harold B. Donahue, Jr.

Harold B. Donahue, Jr. 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).

  • Apparatus and method for comparing a grade to a predetermined slope
    Patent number: 5878502
    Abstract: An apparatus for comparing compliance of a grade to a predetermined slope includes a block and a level. The block has at least one notch positioned at a distance from a first end of the block such that when the method of this invention is practiced, a level indicator will indicate whether a grade on which the apparatus is resting matches a predetermined grade. A method of this invention includes the steps of inserting an arm of predetermined length into the notch and placing the joined block and arm on a grade. A level is placed at the arm to thereby compare compliance of the grade to a predetermine slope.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: March 9, 1999
    Inventor: Harold B. Donahue, Jr.