Patents by Inventor Lawrence J. Coombs

Lawrence J. Coombs 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).

  • Teat cup with air inlet
    Patent number: 4303038
    Abstract: A teat cup has an inflation with an intermediate portion sealed against the shell, defining a space adjacent the bottom of the shell, separate from the pulsation space. Holes through the shell and the inflation wall below the intermediate seal admit air to the inflation aiding the flow of milk. An air filter keeps dirt from the milk.
    Type: Grant
    Filed: February 21, 1980
    Date of Patent: December 1, 1981
    Assignee: Babson Bros. Co.
    Inventors: Duncan M. Thompson, Harold V. Swanson, Lawrence J. Coombs