Patents by Inventor Seishirou Hagiwara

Seishirou Hagiwara 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).

  • Lamp Bulb
    Publication number: 20070278953
    Abstract: An electric lamp which is almost free from an illumination trouble due to breakage of filaments is composed of a light transmitting bulb, a bulb base equipped with a pair of inner terminals and a pair of outer terminals, and a linear light emitting means composed of plural filaments extended in parallel with each other between the inner terminals, in which at least one filament and the other filament are disposed oppositely to each other and shielded from each other with a light transmitting shielding plate.
    Type: Application
    Filed: March 1, 2005
    Publication date: December 6, 2007
    Inventors: Seishirou Hagiwara, Takayuki Kameya, Go Maeda