Patents by Inventor Ralph Frederick Fritsche

Ralph Frederick Fritsche 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).

  • OMNI-GRAVITATIONAL HYDROPONICS SYSTEM
    Publication number: 20200390046
    Abstract: Hydroponics systems and apparatus for operation in zero-gravity and low-gravity environments are disclosed herein. An apparatus can include an elongated main body having an inlet end, an outlet end, and a channel disposed between the inlet end and the outlet end. The channel can include a first portion, and a second portion. The first portion can include surfaces that are inwardly tapered in a direction from the second portion to the first portion. The second portion can include at least one opening such that a portion of a plant can extend through the at least one opening. Fluid can flow through the channel.
    Type: Application
    Filed: June 11, 2020
    Publication date: December 17, 2020
    Applicant: Portland State University
    Inventors: Mark M. Weislogel, Ralph Frederick Fritsche, Gioia Donna Massa, John Bernard McQuillen