Patents by Inventor Alain Macdonald

Alain Macdonald 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).

  • Simultaneous matched feeding apparatus
    Patent number: 4628866
    Abstract: The present invention relates to a simultaneous matched feeding apparatus. The apparatus includes two tube-like members containing liquids. The upper portions of the tubes are interconnected to allow air pressure in the upper portions of the tubes to equilibrate such that when one liquid is removed from one of the tubes, the other tube automatically dispenses a corresponding amount of another liquid.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: December 16, 1986
    Assignee: Alcoholism & Drug Addiction Research Foundation
    Inventors: Yedy Israel, Betsavel Oporto, Alain Macdonald