Patents by Inventor John H. De Blieck

John H. De Blieck 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).

  • Sight rib for firearm leveling
    Patent number: 4406078
    Abstract: An improved sight rib for firearm leveling which is attachable to firearm barrels having a top located bore vent, said sight rib including a housing having one or more upwardly extending apertures in fluid communication with the bore vent. The rib preferably includes an expansion chamber in communication with the bore vent from which a plurality of oppositely disposed backwardly and upwardly inclined apertures extend. By use of an appropriate sight rib, a firearm may be fine-tuned to overcome recoil.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: September 27, 1983
    Inventor: John H. De Blieck