Patents by Inventor Henry J. Boonstra

Henry J. Boonstra 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).

  • Shower door extension apparatus
    Patent number: 8495772
    Abstract: A shower door apparatus is disclosed being secured to the top rim of a bath tub. The shower door apparatus has a base plate extending outward from, and beyond, the top rim of the bath tub. A shower door frame assembly having at least one shower door is secured to the base plate near the edge distal to the bath tub.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: July 30, 2013
    Inventor: Henry J. Boonstra
  • Shower Door Extension Apparatus
    Publication number: 20100031438
    Abstract: A shower door apparatus is disclosed being secured to the top rim of a bath tub. The shower door apparatus has a base plate extending outward from, and beyond, the top rim of the bath tub. A shower door frame assembly having at least one shower door is secured to the base plate near the edge distal to the bath tub.
    Type: Application
    Filed: July 15, 2009
    Publication date: February 11, 2010
    Inventor: Henry J. Boonstra