Patents by Inventor Robert D. Warren

Robert D. Warren 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).

  • Vibratory compactor
    Patent number: 5713418
    Abstract: Vibratory compactors which are intended to be attached to mobile vehicles, such as a forklift truck, skid steer loader, front end loader, or the like. The vibratory compactors are capable of compacting or tamping soil, and/or other materials suitable for compacting or tamping, over extensive areas. The vibratory compactors can tilt in the pitch and roll directions, and the amount of tilt in the pitch and roll directions can be confined.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: February 3, 1998
    Assignee: Warren Power Attachments
    Inventors: Robert D. Warren, Aaron L. Warren
  • Grip portion for a writing instrument
    Patent number: D307444
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: April 24, 1990
    Assignee: The Gillette Company
    Inventors: Norman D. Poisson, Scott G. Searle, Robert D. Warren, Jeffrey Kapec, Kazuna Tanaka
  • Marking instrument
    Patent number: D307601
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: May 1, 1990
    Assignee: The Gillette Company
    Inventors: Norman D. Poisson, Scott G. Searle, Robert D. Warren, Jeffrey Kapec, Kazuna Tanaka