Patents by Inventor Michael Thornhill

Michael Thornhill 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).

  • Reversible plant cage/greenhouse
    Patent number: 5423148
    Abstract: A dual purpose plant cage/greenhouse in an upright greenhouse configuration provides a stable structure that is resistant to being blown over and effectively protects a plant from harsh environmental conditions. In an inverted plant cage configuration, the structure provides an effective structure for supporting the branches of plants. In addition, the top set of legs in the plant cage configuration serve the dual purpose of attaching to other plant cages to provide a highly stable multi-cage inter-structure. The plant cage/greenhouse is easily manufactured and is stackable for low cost shipping.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: June 13, 1995
    Inventor: Michael Thornhill
  • Reversible plant cage/greenhouse
    Patent number: D359929
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: July 4, 1995
    Inventor: Michael Thornhill