Patents by Inventor Terrence B. Christensen

Terrence B. Christensen 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).

  • Injection device
    Patent number: 4487602
    Abstract: An injection device particularly suitable for the intraruminal injection of ruminants is described. The injection device is characterized by a needle carrying means and a needle actuation means, which are operatively coupled such that the needle actuation means permits movement of the needle carrying means from a retracted position to an extended position, wherein the needle is capable of piercing the rumen, only when the needle carrying means is in a preferred orientation (e.g. perpendicular) to the surface of the host animal at the injection site. The injection device is further characterized by a dose delivery actuation means which is responsive to the relative position of the needle carrying means and the needle actuation means such that the dose is delivered to the host animal only when the needle carrying means and the needle actuation means are in a preferred position relative to each other.
    Type: Grant
    Filed: September 13, 1983
    Date of Patent: December 11, 1984
    Assignee: Syntex (U.S.A.) Inc.
    Inventors: Terrence B. Christensen, Allen D. McNaughton, Steven R. Umbach
  • Injection device
    Patent number: 4403989
    Abstract: An injection device particularly suitable for the intraruminal injection of ruminants is described. The injection device is characterized by a needle carrying means and a needle actuation means, which are operatively coupled such that the needle actuation means permits movement of the needle carrying means from a retracted position to an extended position, wherein the needle is capable of piercing the rumen, only when the needle carrying means is in a preferred orientation (e.g. perpendicular) to the surface of the host animal at the injection site. The injection device is further characterized by a dose delivery actuation means which is responsive to the relative position of the needle carrying means and the needle actuation means such that the dose is delivered to the host animal only when the needle carrying means and the needle actuation means are in a preferred position relative to each other.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: September 13, 1983
    Assignee: Syntex (U.S.A.) Inc.
    Inventors: Terrence B. Christensen, Allen D. McNaughton, Steven R. Umbach
  • Laser printer
    Patent number: D290716
    Type: Grant
    Filed: July 2, 1985
    Date of Patent: July 7, 1987
    Assignee: Apple Computer, Inc.
    Inventors: Stephen Peart, Sigmar Willnauer, Terrence B. Christensen