Patents by Inventor Tsuyosi Yokogawa

Tsuyosi Yokogawa 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 fixing mercury containing alloy within fluorescent tubes
    Patent number: 5879216
    Abstract: By applying radiation beam energy to a contact portion between an end portion 7 of a glass tube 1 and a zinc-mercury alloy drop 6 and the vicinity thereof by means of an optical fiber 5, the alloy drop 6 is directly heated so as to be caused to partly melt at a bottom portion thereof and fixed firmly to an inner wall surface of the end portion 7 of the glass tube without causing variations.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: March 9, 1999
    Assignee: Matsushita Electronics Corporation
    Inventors: Yasuto Yoshii, Ikuhiro Okuno, Shozo Miyamoto, Masayuki Tanaka, Masahiro Yoshimoto, Masao Kubo, Tooru Watanabe, Tsuyosi Yokogawa