Black Rifle Arms Patents, Charles Cassels Patent, Patents, BRA Patents, Carrier Buffer Patent, Gas Block Patent, Regulated Piston System, Patented Gas Piston, Patent Regulated Uppers, Patented Buffer and Spring, Patent Buffer and Spring Assembly
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Charles B. Cassels, the owner and designer of Black Rifle Arms® products, has several patented products or patent-pending product(s). These patented products are exclusive to Black Rifle Arms and are limited to certain OEM's for use.

Due to patent laws, those products that have been issued a patent allowance will be listed below with their patent numbers.

35 U.S. Code ยง 271 - Infringement of Patent:

  1. Direct Infringement
  2. Indirect Infringement
  3. Contributory Infringement
  4. Induced Infringement
  5. Willful Infringement
  6. Literal Infringement
  7. Doctrine of Equivalents Infringement
    • If a device does not literally infringe a patent claim, it may still infringe under the Doctrine of Equivalents


Patents Issued: 
ANTI-WEAR BUFFER DEVICE FOR BOLT CARRIER ASSEMBLY: US 8,689,672 B2
MULTI-BLOCK GAS REGULATOR (MICRO GAS BLOCK): US 9,903,675 B2
SUPER & SUBSONIC GAS REGULATORY ASSEMBLY: US9,459,061B2
COMPACT ACTION SPRING & BUFFER ASSEMBLY: US 9,879,930 B2
MULTI-BLOCK GAS REGULATOR: US 8,607,688 B2
BOLT CARRIER ASSEMBLY: US 8,899,142 B1 

     Patent Pending
       FIREARM WITH LOCKED BREECH ROTATING BOLT PISTOL: US Serial No.: 15/852,091


Trademark
       TRADEMARK SERIAL NO.: 86509320