Patents by Inventor Hiroshi Okagaki

Hiroshi Okagaki 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).

  • Hollow cathode discharge tube
    Patent number: 5483121
    Abstract: A hollow cathode discharge tube is used for atomic absorption analysis. The tube has a cathode which includes a first hollow portion and a second hollow portion connected to each other. The second hollow portion has a diameter greater than the first hollow portion and a close end. Inserted through the closed end is a rod-like anode which has a part within the hollow space of the cathode. There is a auxiliary electrode which can be an auxiliary anode that surrounds the rod-like anode and is insulated therefrom. There is an additional electrode which can be an auxiliary cathode at the front end portion of the cathode. The cathode is formed of a material that is a material or includes a material that is to be analyzed.
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: January 9, 1996
    Assignee: Koto Electric Co., Ltd.
    Inventors: Hiroshi Okagaki, Takayuki Kameya, Hiroshi Ishizaki, Kazuya Abe