Patents by Inventor Douglas R. Schaffer

Douglas R. Schaffer 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).

  • SPRING-LOADED FIREARM MAGAZINE
    Publication number: 20080127539
    Abstract: A quick-release magazine for use with firearms is provided, the magazine comprising a conventional firearm magazine and a spring, the spring comprising a center plate with two fins projecting outwardly from the plate. The spring is positioned between the floor plate and base pad of the magazine, with the center plate of the spring aligning with the magazine and the fins projecting outwardly from the plate. When the magazine of the present invention is inserted into a firearm, the fins are compressed between the magazine and the gun. The compressed fins provide a forceful ejection from the firearm when the magazine must be replaced.
    Type: Application
    Filed: December 17, 2004
    Publication date: June 5, 2008
    Inventor: Douglas R. Schaffer
  • Spring-loaded firearm magazine
    Patent number: 7373751
    Abstract: A quick-release magazine for use with firearms is provided, the magazine comprising a conventional firearm magazine and a spring, the spring comprising a center plate with two fins projecting outwardly from the plate. The spring is positioned between the floor plate and base pad of the magazine, with the center plate of the spring aligning with the magazine and the fins projecting outwardly from the plate. When the magazine of the present invention is inserted into a firearm, the fins are compressed between the magazine and the gun. The compressed fins provide a forceful ejection from the firearm when the magazine must be replaced.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: May 20, 2008
    Inventor: Douglas R. Schaffer