Patents by Inventor Mark Engstrom

Mark Engstrom 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).

  • Publication number: 20130283723
    Abstract: Corner joints and methods of forming such joints using hollow frame members are described. The corner joints are manufactured using corner keys inserted into the ends of the frame members. In addition to holding the frame members together, one or more capillary break members protrude from the corner key so that the one or more capillary break members are located between the assembled frame members and the corner key forming the corner joint.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 31, 2013
    Inventor: Mark Engstrom