Patents by Inventor Hirota WATANABE

Hirota WATANABE 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 for Manufacturing an Electric Bulb
    Publication number: 20090253334
    Abstract: In an electric bulb wherein a pair of lead-in wires 14a, 14b for suspending a filament 16 is supported with a space by heating and melting a glass bead 15 made of glass, a concave portions 15a, 15b are formed at the contact portion of an outer surface of the glass bead 15 and the lead-in wires 14a, 14b, so that rising of the molten glass along the lead-in wires is suppressed. Thus, break of filament 16 owing to the generation of glass bead chippings or minute cracks is avoided, thereby providing a electric bulb having high production yield and high reliability.
    Type: Application
    Filed: June 17, 2009
    Publication date: October 8, 2009
    Applicant: Harison Toshiba Lighting Corporation
    Inventors: Kenji MATSUMOTO, Hirota WATANABE, Masahiro HIRAOKA
  • Electric bulb and a method for manufacturing thereof
    Publication number: 20050194879
    Abstract: In an electric bulb wherein a pair of lead-in wires 14a, 14b for suspending a filament 16 is supported with a space by heating and melting a glass bead 15 made of glass, a concave portions 15a, 15b are formed at the contact portion of an outer surface of the glass bead 15 and the lead-in wires 14a, 14b, so that rising of the molten glass along the lead-in wires is suppressed. Thus, break of filament 16 owing to the generation of glass bead chippings or minute cracks is avoided, thereby providing a electric bulb having high production yield and high reliability.
    Type: Application
    Filed: December 8, 2004
    Publication date: September 8, 2005
    Applicant: Harison Toshiba Lighting Corporation
    Inventors: Kenji Matsumoto, Hirota Watanabe, Masahiro Hiraoka