Patents by Inventor David Calder

David Calder 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).

  • Patent number: 11910779
    Abstract: The invention is directed to an animal marking and treatment apparatus. The marking apparatus is an animal treatment apparatus to apply an animal treatment to a surface or subcutaneous layer of an animal via an operative end. The marking apparatus includes a marking portion, attached to the animal treatment apparatus, and located at the operative end. The marking apparatus is located such that when the animal receives the treatment the marking portion marks the animal by stamping at the same time.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: February 27, 2024
    Assignee: Datamars SA
    Inventor: David Calder
  • Publication number: 20190037804
    Abstract: The invention is directed to an animal marking and treatment apparatus. The marking apparatus is an animal treatment apparatus to apply an animal treatment to a surface or subcutaneous layer of an animal via an operative end. The marking apparatus includes a marking portion, attached to the animal treatment apparatus, and located at the operative end. The marking apparatus is located such that when the animal receives the treatment the marking portion marks the animal by stamping at the same time.
    Type: Application
    Filed: August 1, 2018
    Publication date: February 7, 2019
    Applicant: Simcro Limited
    Inventor: David Calder
  • Patent number: 5072474
    Abstract: The invention relates to a method of constructing a cable-stayed bridge extending between at least three towers. Initially, a horizontally extending truss spanning from a first tower to a second tower is moved longitudinally to be projected from the second tower to a third tower. The truss is then elevated. A plurality of stay cables are then strung from an elevated location on the second tower to a series of temporary connections to the truss on both sides of the second tower. A deck portion is then constructed on the truss on both sides of the second tower, and the cables that are not connected to the truss are connected to this deck portion. Finally, the cables are disconnected from the truss and the truss and hence the deck portion are lowered, causing the cables to support the weight of the deck and to acquire the desired tensional stresses. The procedure is faster than hitherto know methods of constructing this type of bridge.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: December 17, 1991
    Inventors: Walter H. Dilger, Gamil S. Tadros, David Calder, Paul B. Giannelia