Patents by Inventor Mitsutoshi Imada

Mitsutoshi Imada 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).

  • Frequency-multiplex optical transmission apparatus
    Patent number: 5347385
    Abstract: A frequency-multiplex optical transmission apparatus for carrying out frequency-multiplex optical transmission by supplying an analog-frequency-multiplexed RF input signal to a laser diode. In the apparatus, part of the RF input signal taken out by a splitter is detected by a power detector. In response to an output signal of the power detector, an indicator driver causes an indicator to indicate a modulation signal level for the laser diode. The level of the RF input signal is adjustable by an attenuator while observing the indication state of the indicator.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: September 13, 1994
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Mitsutoshi Imada