Patents by Inventor Takumi Haga

Takumi Haga 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).

  • Dual mode radio communication apparatus having function of selectively designating analog or digital mode
    Patent number: 5710986
    Abstract: A radio communication apparatus of this invention includes a mode designation switch for selectively designating and inputting a desired mode from an analog mode and a digital mode, and a mode storage circuit for storing the desired mode designated and input by the mode designation switch and has a mode setting control function, a mode comparison function, and a mode change control function. In order to establish a radio link, control is performed to set a mode for transmitting a communication signal in accordance with the desired mode stored in the mode storage circuit. After the start of transmission of the communication signal, the mode comparison function compares the mode set by the mode setting control function with the desired mode stored in the mode storage circuit.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: January 20, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Arata Obayashi, Takumi Haga, Naoyuki Wakabayashi, Takashi Sakagawa
  • Dual mode radio communication apparatus having function of selectively designating analog or digital mode
    Patent number: 5564077
    Abstract: A radio communication apparatus of this invention includes a mode designation switch for selectively designating and inputting a desired mode from an analog mode and a digital mode, and a mode storage circuit for storing the desired mode designated and input by the mode designation switch and has a mode setting control function, a mode comparison function, and a mode change control function. In order to establish a radio link, control is performed to set a mode for transmitting a communication signal in accordance with the desired mode stored in the mode storage circuit. After the start of transmission of the communication signal, the mode comparison function compares the mode set by the mode setting control function with the desired mode stored in the mode storage circuit.
    Type: Grant
    Filed: February 4, 1993
    Date of Patent: October 8, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Arata Obayashi, Takumi Haga, Naoyuki Wakabayashi, Takashi Sakagawa
  • Digital communication apparatus having an error detecting section
    Patent number: 5400320
    Abstract: In a digital communication apparatus, when a slot is received by a transmission system, two different data included in the received slot are stored in two data storage circuits, respectively, by a predetermined amount, and are read out therefrom at different times, that is, time-divisionally. An error in the data having different transfer formats read out from the two data storage circuits is detected by a CRC data decoder formed of a single circuit based on a detection code such as CRC (cyclic redundancy check) code.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: March 21, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masayuki Tanaka, Takumi Haga
  • Digital communication apparatus having an error detecting section
    Patent number: 5289471
    Abstract: In a digital communication apparatus, when a slot is received by a transmission system, two different data included in the received slot are stored in two data storage circuits, respectively, by a predetermined amount, and are read out therefrom at different times, that is, time-divisionally. An error in the data having different transfer formats read out from the two data storage circuits is detected by a CRC data decoder formed of a single circuit based on a detection code such as CRC (cyclic redundancy check) code.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: February 22, 1994
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masayuki Tanaka, Takumi Haga