Patents by Inventor Tatsuo Hikosaka

Tatsuo Hikosaka 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).

  • Method of raising sea-water fish, display tank for sea-water fish and tank system for raising sea-water fish
    Patent number: 5560318
    Abstract: A method of raising sea-water fish is performed by raising the sea-water fish in water in a display tank which includes a device for circulating the water in the tank, a filtering material supporting plate having a sand-like filtering material containing calcium therein. In this case, the grain size of the sand-like filtering material is set between 2.5-3.5 mm. Coral sand is preferably used as the sand-like material, since it promotes the propagation of aerobic bacteria and converts ammonia and nitric acid to harmless materials and the above grain size exhibits better effect.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: October 1, 1996
    Assignee: ODI Co., Ltd.
    Inventors: Norihiro Yoshida, Tatsuo Hikosaka