Patents by Inventor Tohru Fujioka

Tohru Fujioka 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).

  • Metal vapor discharge lamp
    Patent number: 5500571
    Abstract: A metal vapor discharge lamp includes an arc tube having on an inner surface a coating of multi-layer construction including a layer preferably facing the interior discharge space of the arc tube and formed with a strongly covalent bonded material and at least another layer made to have a function of shielding water, whereby reaction of enclosed materials with the arc tube and oozing of water from the arc tube can be prevented, and cracking and peeling of the coating can be effectively prevented from occurring.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: March 19, 1996
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Atsunori Okada, Shigeaki Wada, Shigekazu Kusanagi, Tohru Fujioka