Patents by Inventor Gerald P. Tjernagel

Gerald P. Tjernagel 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).

  • Anaerobic system container
    Patent number: 4033826
    Abstract: In a culture system container for receiving a plurality of culture dishes and for providing anaerobic growth conditions a tray is provided which has an upstanding wall, and a transparent top sealingly engageable with the wall, and a transparent bottom portion. The culture system container is stackable for convenient storage and handling.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: July 5, 1977
    Inventors: Otis M. Larsen, Richard D. Larsen, Gerald P. Tjernagel, Steven L. Marine
  • Laboratory filter
    Patent number: D285487
    Type: Grant
    Filed: July 18, 1983
    Date of Patent: September 2, 1986
    Assignee: Trend Scientific, Inc.
    Inventor: Gerald P. Tjernagel