Patents by Inventor Roy Piontek

Roy Piontek 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).

  • Barrel extension
    Patent number: 8739450
    Abstract: The present invention relates to barrel extensions for firearms that have been converted to fire different, most likely lower, caliber ammunition than the firearms were originally designed to accommodate. The present invention in several embodiments is a barrel extension designed to supplement or replace the barrels and/or barrel extensions of firearms that have a sub-caliber conversion installed. Several embodiments of the present invention are configured to be installed on AR15 family rifles with a .22LR ammunition conversion to allow for accurate shooting of the .22LR ammunition through the barrel extension.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: June 3, 2014
    Assignee: E.R. Shaw, Inc.
    Inventor: Roy Piontek