Patents by Inventor Paul A. Doerr

Paul A. Doerr 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 for preventing interference of intermeshing lugs on separable rollers
    Patent number: 6220007
    Abstract: Two mower-conditioner lugged rollers provided with a four-gear timing system that allows the rollers to separate while still maintaining the timing.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: April 24, 2001
    Assignee: Vermeer Manufacturing Company
    Inventors: Paul A. Doerr, Philip J. Egging