Patents by Inventor Hirosumi Cho

Hirosumi Cho 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).

  • Bulb and a method for welding a pipe and a conductive wire thereof
    Patent number: 6492771
    Abstract: A bulb comprises an airtight envelope having a filling gas therein. A conductive wire extends outwardly from the airtight envelope. A conductive pipe pin has the conductive wire passed therethrough, a predetermined welding portion, and a welded portion including a smooth surface. An outer diameter of the welded portion is no greater than the outer diameter of the pin. The welded portion may be formed in the pipe pin by the fluid of the melted conductive wire and predetermined welding portion flowing into the pipe pin and hardening.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: December 10, 2002
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Hirosumi Cho, Kenji Sakai
  • Bulb and a method for welding a pipe and a conductive wire thereof
    Publication number: 20010028219
    Abstract: A bulb comprises an airtight envelope having a filling gas therein. A conductive wire extends outwardly from the airtight envelope. A conductive pipe pin has the conductive wire passed therethrough, a predetermined welding portion, and a welded portion including a smooth surface. An outer diameter of the welded portion is no greater than the outer diameter of the pin. The welded portion may be formed in the pipe pin by the fluid of the melted conductive wire and predetermined welding portion flowing into the pipe pin and hardening.
    Type: Application
    Filed: January 22, 2001
    Publication date: October 11, 2001
    Inventors: Hirosumi Cho, Kenji Sakai