Patents by Inventor Mark E. MacRitchie

Mark E. MacRitchie 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).

  • Patent number: D324161
    Type: Grant
    Filed: September 19, 1990
    Date of Patent: February 25, 1992
    Inventor: Mark E. MacRitchie