Patents by Inventor David Arthur Johnson

David Arthur Johnson 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).

  • Publication number: 20240191310
    Abstract: Disclosed herein are methods of assessing whether a subject would be responsive to an immunotherapy.
    Type: Application
    Filed: June 21, 2022
    Publication date: June 13, 2024
    Inventors: Daniel Reed Rhodes, Scott Arthur Tomlins, David Bryan Johnson
  • Patent number: 8898946
    Abstract: A magazine adapter includes a base that is structured to fit within the magazine well of a firearm, and to accept a magazine designed for smaller caliber ammunition than the original firearm. The adapter includes a bolt catch actuator slidably mounted therein. Magazines for which the adapter is intended include an upwardly extending rear projection of the follower, projecting from an opening in the rear of the magazine housing when the follower is in an upper portion of the magazine. When the upwardly extending projection pushes upward on the bolt catch actuator, the bolt catch is actuated, holding the firearms bolt in a rearward position. The magazine adapter thereby facilitates use of the original firearm controls with a caliber conversion unit, or with an upper receiver and barrel combination of a different caliber.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: December 2, 2014
    Inventor: David Arthur Johnson