Patents by Inventor Richard W. Herzfeld

Richard W. Herzfeld 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).

  • Hole digging tool
    Patent number: 6254154
    Abstract: An improved digging tool for digging holes and the like. A shovel is pivotally attached to a handle shaft and includes an improved primary lever mechanism and a secondary lever mechanism.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: July 3, 2001
    Assignee: Victorian Postman Limited, L.L.C.
    Inventors: Richard W. Herzfeld, John E. Puhl