Patents by Inventor David B. Stark

David B. Stark 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).

  • Fast-Twist Subsonic Bullet
    Publication number: 20230392910
    Abstract: A bullet designed to expand reliably at subsonic velocities has a front end region divided by notches into petals and a groove on its exterior surface. Each notch may be separated into a notch forward segment and a notch rear segment by a discontinuity. Each notch may be cut with a depth such as to provide a web of material extending along a portion of the length of a central cavity.
    Type: Application
    Filed: June 1, 2023
    Publication date: December 7, 2023
    Inventor: David B. Stark
  • Expanding subsonic bullet
    Patent number: 10823539
    Abstract: A bullet designed to expand reliably at subsonic velocities has a leading end region divided by notches into petals. The exterior of the bullet has a groove configured to allow limited initial bending of the petals to facilitate spreading of the petals to increase the cross-section of the bullet upon impact with a target.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: November 3, 2020
    Inventors: Alliwyn J. Oberholster, David B. Stark
  • Reduction of first shot noise in firearm sound suppressors
    Patent number: 10337819
    Abstract: First round shot noise and flash caused by combustion of oxygen contained in the air residing in a firearm sound suppresser can be reduced by providing a valve that communicates with the baffled interior space of the suppressor, and connecting a source of non-flammable gas such as CO2 to the valve in order to inject the gas into the suppressor. The non-flammable gas displaces the air in the suppressor, removing the oxygen available for combustion when the first shot is fired.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: July 2, 2019
    Inventors: David B. Stark, Martin F. Stark, Anthony J. Parilllo
  • Reduction of first shot noise in firearm sound suppressors
    Patent number: 10145636
    Abstract: First round shot noise and flash caused by combustion of oxygen contained in the air residing in a firearm sound suppresser can be reduced by providing a valve that communicates with the baffled interior space of the suppressor, and connecting a source of non-flammable gas such as CO2 to the valve in order to inject the gas into the suppressor. The non-flammable gas displaces the air in the suppressor, removing the oxygen available for combustion when the first shot is fired.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: December 4, 2018
    Inventors: David B. Stark, Martin F. Stark, Anthony J. Parilllo
  • Reduction of First Shot Noise in Firearm Sound Suppressors
    Publication number: 20180202743
    Abstract: First round shot noise and flash caused by combustion of oxygen contained in the air residing in a firearm sound suppresser can be reduced by providing a valve that communicates with the baffled interior space of the suppressor, and connecting a source of non-flammable gas such as CO2 to the valve in order to inject the gas into the suppressor. The non-flammable gas displaces the air in the suppressor, removing the oxygen available for combustion when the first shot is fired.
    Type: Application
    Filed: January 12, 2018
    Publication date: July 19, 2018
    Inventors: David B. Stark, Martin F. Stark, Anthony J. Parilllo