Patents by Inventor Donald Ernest Lipfert

Donald Ernest Lipfert 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).

  • Cushioning material construction
    Patent number: 4033567
    Abstract: A cushioning material system or construction having at least one module comprising balanced levers and displaceable bearing means.
    Type: Grant
    Filed: April 2, 1973
    Date of Patent: July 5, 1977
    Assignee: Deres Development Corporation
    Inventor: Donald Ernest Lipfert
  • Protective head gear and body equipment
    Patent number: 4032127
    Abstract: Protective equipment for the head, body, or the like, having at least one module comprising levers and displaceable bearing means.
    Type: Grant
    Filed: February 4, 1974
    Date of Patent: June 28, 1977
    Assignee: Deres Development Corporation
    Inventor: Donald Ernest Lipfert