Patents by Inventor Masanobu Takeguchi

Masanobu Takeguchi 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 purifying water in fish keeping water tank
    Patent number: 4390432
    Abstract: A water treating method is disclosed. Water stored in a container is circulated through an external passageway and subjected to ultraviolet radiation and biological oxidation treatment, whereupon the growth of undesired aquatic chlorophyceae and microorganisms is inhibited and at the same time, organic matter is decomposed and removed, thereby maintaining a low COD level and clarifying water in the container. This method is particularly useful for keeping water in a container clean.
    Type: Grant
    Filed: August 6, 1981
    Date of Patent: June 28, 1983
    Assignee: Marui Industry Co., Ltd.
    Inventors: Masanobu Takeguchi, Isao Oyobe
  • Method of inhibiting and eliminating chlorophyceae in water in tank
    Patent number: 4320085
    Abstract: Water stored in a container is circulated through an external passageway and subjected to ultraviolet radiation, whereupon undesired aquatic chlorophyceae are eliminated by inhibiting their growth. The water is circulated at such a rate that at least half the volume of water in the container is circulated per hour.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: March 16, 1982
    Assignee: Marui Industry Co., Ltd.
    Inventors: Masanobu Takeguchi, Isao Oyobe
  • Method of purifying water in fish keeping water tank
    Patent number: 4297222
    Abstract: A water treating method is disclosed. Water stored in a container is circulated through an external passageway and subjected to ultraviolet radiation and biological oxidation treatment, whereupon the growth of undesired aquatic chlorophyceae and microorganisms is inhibited and at the same time, organic matter is decomposed and removed, thereby maintaining a low COD level and clarifying water in the container. This method is particularly useful for keeping water in a container clean.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: October 27, 1981
    Assignee: Marui Industry Co., Ltd.
    Inventors: Masanobu Takeguchi, Isao Oyobe