Patents by Inventor John Michael Schaffhausen

John Michael Schaffhausen 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).

  • Adjustable single hung, double hung, sliding window, sliding glass door lock
    Patent number: 8556307
    Abstract: This invention provides an easily removable locking mechanism used on single hung, double hung, sliding window and sliding doors that will lock these items at various intervals. Two mounting bases are provided and designed to be interchangeable with each end of the locking mechanism and to provide ease of removal/installation of the locking mechanism in case of emergencies. The locking mechanism is comprised of two telescoping tubes with a permanent interlocking pin to hold the telescoping tubes at various intervals.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: October 15, 2013
    Inventor: John Michael Schaffhausen