Patents by Inventor Masanao Soeda

Masanao Soeda 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).

  • Hydroponic culture apparatus
    Patent number: 5887383
    Abstract: A liquid supply pump unit for hydroponic culture, which can perform oxygen enrichment and has a small power consumption, and a hydroponic culture apparatus, which utilizes this liquid supply pump unit and automatically supplies a larger amount of oxygen in the daytime when the plant growth is active, are disclosed.
    Type: Grant
    Filed: April 24, 1997
    Date of Patent: March 30, 1999
    Assignee: Farmer's Design Inc.
    Inventor: Masanao Soeda