Patents by Inventor Hiroshi Oi

Hiroshi Oi 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).

  • FORWARD RAMAN AMPLIFIER, BIDIRECTIONAL RAMAN AMPLIFICATION SYSTEM, AND FORWARD RAMAN AMPLIFICATION SYSTEM
    Publication number: 20240129034
    Abstract: A forward Raman amplifier includes a plurality of pumping light sources with different wavelengths and the forward Raman amplifier, according to a fiber type or a zero-dispersion wavelength of the fiber, changes the number of pumping light sources to be emitted, changes a power ratio between the plurality of pumping light sources with the different wavelengths or changes wavelength characteristics of a gain, according to a fiber type.
    Type: Application
    Filed: July 12, 2023
    Publication date: April 18, 2024
    Applicant: Fujitsu Limited
    Inventors: Hiroshi NAKAMOTO, GOJI NAKAGAWA, Kentaro KAWANISHI, Hiroki OI, Tomohiro YAMAUCHI, Takafumi TERAHARA, Teppei OHATA
  • Television receiver
    Patent number: D256920
    Type: Grant
    Filed: February 16, 1978
    Date of Patent: September 16, 1980
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Takashima, Hiroshi Oi, Michio Ogawa