Patents by Inventor Perry B. Drum

Perry B. Drum 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).

  • Circular saw having reduced noise
    Patent number: 4034638
    Abstract: This invention consists of a low noise circular disk blade having shallow peripheral gullets, said gullets being of a minimum radial depth whereby the sound generated by the blade's rotation is less than 90 decibels.
    Type: Grant
    Filed: July 29, 1976
    Date of Patent: July 12, 1977
    Assignee: McCrary Saw & Tool Company
    Inventor: Perry B. Drum