Patents by Inventor John R. Strenger

John R. Strenger 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).

  • Plant growth enhancement enclosure
    Patent number: D263366
    Type: Grant
    Filed: August 9, 1979
    Date of Patent: March 16, 1982
    Inventors: John R. Strenger, Steven D. Blanchard
  • Portable greenhouse
    Patent number: D276898
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: December 25, 1984
    Inventors: John R. Strenger, Steven D. Blanchard