Patents by Inventor Marinus Burcht Holwerda

Marinus Burcht Holwerda 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).

  • Coffee brewing apparatus
    Patent number: D555412
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: November 20, 2007
    Assignees: Martex Holland B.V., Electrical & Electrical Ltd., Coval Art Tec Limited
    Inventors: Alfred Hendrik Van Elk, Marinus Burcht Holwerda