Patents by Inventor David R. Field

David R. Field 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).

  • Combustible ammunition cartridge case
    Patent number: 5138949
    Abstract: An ammunition cartridge is disclosed comprising a projectile threadably attached to a combustible case body via a threaded combustible case adapter. At least one of the adapter end have an uniform density of polyurethane resin to provide strength and sufficient support for the threads. The combustible case body may also have an uniform resin density to support threads corresponding to those on the rear end of the adapter. The preferable uniform polyurethane density is about 0.75 grams per cubic centimeter.
    Type: Grant
    Filed: September 20, 1990
    Date of Patent: August 18, 1992
    Assignee: Olin Corporation
    Inventors: Terry L. Swartout, Stephen B. Ehlers, David R. Field, Terence Connolly
  • Anti-detonation powder safety device
    Patent number: 4342251
    Abstract: A anti-detonation safety device for use in a bulk handling system transporting explosive powder. The device comprises spaced inlet and outlet members and, disposed therebetween, a plurality of interconnected planar panels defining a cruciform chamber, the wings of which each include a top panel, operable in response to an increase of the pressure in the chamber, to provide for venting the same.
    Type: Grant
    Filed: March 3, 1980
    Date of Patent: August 3, 1982
    Assignee: Olin Corporation
    Inventors: Richard W. Wahlfeldt, David R. Field
  • Camouflage coverall
    Patent number: D351271
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: October 11, 1994
    Inventor: David R. Fields