Patents by Inventor P. J. Marx

P. J. Marx 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).

  • High volume multiple component projectile assembly
    Patent number: 9470494
    Abstract: A projectile includes a head, a tail, and an interface that interconnects the head and tail. Multiple sections of the interface are deformed by being compressed radially inwardly into respective annular recesses formed between the interface and the head and tail during manufacturing or by rifling when the projectile is fired. The amount of deformation is controlled by the depth of each of the annular recesses. In all embodiments, annular ridges formed in the head, the tail, or both, define the longitudinal extent of the annular recesses. The interface includes an annular obturation region and has a beveled open leading end to facilitate insertion of the head and tail into the interface.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: October 18, 2016
    Assignee: Liberty Ammuntion, Inc.
    Inventor: P J Marx
  • High volume multiple component projectile assembly
    Patent number: 8857343
    Abstract: A projectile includes a head, a tail, and an interface that interconnects the head and tail. Multiple sections of the interface are deformed by being compressed radially inwardly into respective annular recesses formed between the interface and the head and tail during manufacturing or by rifling when the projectile is fired. The amount of deformation is controlled by the depth of each of the annular recesses. In all embodiments, annular ridges formed in the head, the tail, or both, define the longitudinal extent of the annular recesses. The interface includes an annular obturation region and has a beveled open leading end to facilitate insertion of the head and tail into the interface.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: October 14, 2014
    Assignee: Liberty Ammunition, LLC
    Inventor: P J Marx
  • Neck and body assembly for a stringed instrument
    Patent number: 4896578
    Abstract: An apparatus for joining the neck and body of a stringed instrument includes a connecting flange of reduced thickness at the base of the neck and a cavity in the upper portion of the body for receiving the connecting flange and creating a junction having a thickness substantially equal to that of the base of the neck.
    Type: Grant
    Filed: June 6, 1989
    Date of Patent: January 30, 1990
    Inventor: P. J. Marx
  • Guitar neck
    Patent number: D297332
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: August 23, 1988
    Inventor: P. J. Marx