Patents by Inventor John W. Upperman

John W. Upperman 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).

  • Method and apparatus for extending the egg production cycle and for hardening egg shells
    Patent number: 4470374
    Abstract: A method and apparatus for feeding egg laying hens carbonated water on demand to modify the normal egg laying cycle of hens by increasing substantially the length of the continuous egg laying period and to increase the hardness of the egg shells and reduce losses due to egg breakage.
    Type: Grant
    Filed: June 1, 1983
    Date of Patent: September 11, 1984
    Inventor: John W. Upperman