The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2026
Filed:
Jul. 25, 2024
The United States of America, As Represented BY the Secretary of the Navy, Crane, IN (US);
Brian R. Hoffman, Bloomington, IN (US);
Robert Caprara, Fairfax, VA (US);
Lucas Lafontaine, Bloomington, IN (US);
Abstract
Disclosed is a firearm barrel that includes a bore, a rifling pattern along a length of the bore, and a grooved gas-venting pattern along a length of the bore that exceeds an envelope of the rifling pattern. The rifling pattern imparts spin on a bullet to stabilize the bullet in flight, while the grooved gas-venting pattern allows expanding propellant gases to escape around the bullet as it travels down the bore, causing a reduction in internal pressure acting on the bullet and reducing bullet velocity. The inventive barrel can reduce bullet velocity of standard ammunition, such as 5.56×45 mm NATO or 7.62×51 mm NATO to a subsonic velocity, or approximately 1125 feet per second at sea level without the need for specialized ammunition.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile