Patents by Inventor David W. Van Winkle

David W. Van Winkle 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: 4463706
    Abstract: The disclosed system comprises one or more stationary dispensers associated with drinking fountains for farm animals, for dispensing predetermined doses of drugs or nutrients, operating in cooperation with a plurality of portable units constructed for individual animals. The portable units are designed to interact electronically with a stationary dispenser to control the amount and timing of the doses. The stationary dispenser includes in circuit relation, an interrogator-transmitter, a reply receiver, and a liquid dispenser responsive to the reply receiver. Each portable system comprises a coded passive transponder, a timer, and a memory element. When an animal comes within range of the stationary dispenser, its portable transponder is interrogated. A coded reply is sent by the animal's transponder indicating whether animal has received a dose within a preceeding preselected time interval. If a positive reply is received by the stationary dispenser circuit, no further action is taken.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: August 7, 1984
    Assignee: J.B.M. Associates
    Inventors: Jack B. Meister, David W. Van Winkle