Patents by Inventor Robert Spiegelhauer

Robert Spiegelhauer 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).

  • Firearm modification accessory
    Patent number: 9134092
    Abstract: A bottom hand grip for a firearm, such as AK-47 type rifle is mountable on the rifle in place of a bottom forend. The bottom hand grip engages a front end of the receiver assembly and is further supported by an attachment bolt passing through its bottom plate. Double-walled body of the bottom hand grip is provided with a plurality of openings that help dissipate heat from the firing mechanism and also serve as a means for mounting a rail for a firearm accessory.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: September 15, 2015
    Inventor: Robert Spiegelhauer
  • Firearm Modification Accessory
    Publication number: 20140331538
    Abstract: A bottom hand grip for a firearm, such as AK-47 type rifle is mountable on the rifle in place of a bottom forend. The bottom hand grip engages a front end of the receiver assembly and is further supported by an attachment bolt passing through its bottom plate. Double-walled body of the bottom hand grip is provided with a plurality of openings that help dissipate heat from the firing mechanism and also serve as a means for mounting a rail for a firearm accessory.
    Type: Application
    Filed: May 8, 2013
    Publication date: November 13, 2014
    Inventor: Robert Spiegelhauer