Patents by Inventor Motoyasu Nagashima

Motoyasu Nagashima 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).

  • Patent number: 6323977
    Abstract: In an optical transmitting and receiving apparatus. an light transmitting and receiving unit includes a light emitting element, a light transmitting lens, a light receiving lens, and a photosensitive element. The light emitting element outputs light. The light outputted from the light emitting element passes through the light transmitting lens before leaving the light transmitting and receiving unit as outgoing light. The light receiving lens concentrates incoming light on the photosensitive element. A first support member is operative for supporting the light transmitting and receiving unit, and for allowing the light transmitting and receiving unit to rotate about a first axis. A first rotary mechanism connected to the light transmitting and receiving unit and the first support member is operative for rotating the light transmitting and receiving unit about the first axis.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: November 27, 2001
    Assignees: Victor Company of Japan, Ltd., NTT Data Communications Systems Corporation
    Inventors: Toshiaki Shou, Fumio Sato, Yoshiaki Yunoki, Motoyasu Nagashima, Masamichi Sato, Kazumasa Taninaka
  • Patent number: 6181452
    Abstract: In an optical transmitting and receiving apparatus, an light transmitting and receiving unit includes a light emitting element, a light transmitting lens, a light receiving lens, and a photosensitive element. The light emitting element outputs light. The light outputted from the light emitting element passes through the light transmitting lens before leaving the light transmitting and receiving unit as outgoing light. The light receiving lens concentrates incoming light on the photosensitive element. A first support member is operative for supporting the light transmitting and receiving unit, and for allowing the light transmitting and receiving unit to rotate about a first axis. A first rotary mechanism connected to the light transmitting and receiving unit and the first support member is operative for rotating the light transmitting and receiving unit about the first axis.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: January 30, 2001
    Assignees: Victor Company of Japan, Ltd., NTT Data Communications Systems Corporation
    Inventors: Toshiaki Shou, Fumio Sato, Yoshiaki Yunoki, Motoyasu Nagashima, Masamichi Sato, Kazumasa Taninaka
  • Patent number: 5640390
    Abstract: A wireless communication network system includes a communication controller, and a plurality of terminal devices which can communicate with the communication controller by wireless. The communication controller includes a first section for detecting absence of a received signal from any of the terminal devices, and a second section responsive to an output signal of the first section for periodically generating a nonbusy signal, which can be discriminated from another signal transmitted from the communication controller, in the absence of the received signal. Each of the terminal devices includes a third section for detecting the nonbusy signal, and a fourth section responsive to an output signal of the third section for permitting transmission from the terminal device after the nonbusy signal is received by the third section.
    Type: Grant
    Filed: July 1, 1994
    Date of Patent: June 17, 1997
    Assignees: Victor Compay of Japan, Ltd., NTT Data Communications Systems Corporation
    Inventors: Atsushi Sakamoto, Motoyasu Nagashima, Kazumasa Taninaka, Kouji Nishimura
  • Patent number: 5532858
    Abstract: An optical radio communication system comprising a first light transmitting system and a second light transmitting system. Each of said first and second light transmitting system comprising a transmitting means and a receiving means. Said transmitting means comprising a light emitting element positioned in a region including and surrounding a focal point of a first parabolic reflector for emitting light beams, said first parabolic reflector having an inner reflective surface for reflecting said light beams emitted from said light emitting element, and a means for driving said light emitting element with a signal to be transmitted.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: July 2, 1996
    Assignees: Nit Data Communications Victor Company of Japan, Systems Corporation
    Inventors: Kazutoshi Hirohashi, Teruhiko Shinomiya, Manabu Sakane, Keishi Ushijima, Takaaki Takeda, Masamichi Satou, Michio Kikuta, Motoyasu Nagashima