Patents by Inventor Masafumi Shiobara

Masafumi Shiobara 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).

  • Control station apparatus base station apparatus and optical transmission method
    Publication number: 20040214603
    Abstract: Frequency converting sections 104a to 104n convert the frequency of modulated transmission signals to signals of an intermediate frequency by multiplying the transmission signals by a local signal; filter sections 105a to 105n attenuate the transmission signals after frequency conversion in the frequency regions outside the frequency band of the desired signals; and E/O sections 106a to 106n convert the transmission signals from electric signals to optical signals and output them to the O/E sections 151a to 151n of the base station apparatus 150.
    Type: Application
    Filed: March 16, 2004
    Publication date: October 28, 2004
    Inventors: Manabu Tanabe, Akihito Ogawa, Susumu Ishizuka, Hiroyuki Sasai, Keiji Takakusaki, Naoki Matsubara, Takanori Mizutani, Masafumi Shiobara, Tetsuya Hattori