Patents by Inventor Tomohiro Takegawa

Tomohiro Takegawa 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: 5379454
    Abstract: A tuner having a programmable frequency divider which selects a broadcast station in accordance with a frequency division number, and a broadcast station selecting device. The selecting device includes an input device for inputting information representing a broadcast station; a memory means for storing information representing a plurality of broadcast stations and for storing frequency division numbers respectively corresponding to the stored information; and a control circuit for reading from the memory he stored frequency division number corresponding to the inputted information by the input device, and for supplying the read frequency division number to the programmable frequency divider so that the programmable frequency divider will select a broadcast station in accordance with the supplied frequency division number.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: January 3, 1995
    Assignee: Pioneer Electronic Corporation
    Inventors: Tomohiro Takegawa, Akira Tasaki, Hiroshi Koinuma
  • Patent number: 5023938
    Abstract: A tuner having a programmable frequency divider which selects a broadcast station in accordance with a frequency division number, and a broadcast station selecting device. The selecting device includes an input device for inputting information representing a broadcast station; a memory means for storing information representing a plurality of broadcast stations and for storing frequency division numbers respectively corresponding to the stored information; and a control circuit for reading from the memory he stored frequency division number corresponding to the inputted information by the input device, and for supplying the read frequency division number to the programmable frequency divider so that the programmable frequency divider will select a broadcast station in accordance with the supplied frequency division number.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: June 11, 1991
    Assignee: Pioneer Electronic Corporation
    Inventors: Tomohiro Takegawa, Akira Tasaki, Hiroshi Koinuma
  • Patent number: 4953213
    Abstract: The invention provides surround mode stereophonic reproducing equipment for using the Dolby surround mode and another surround mode other than the Dolby mode by means of selectively switching between them. The equipment is provided with two front power amplifiers for driving front speakers on the right and left, and two rear power amplifiers for driving the rear speakers. The rear speakers are driven jointly by one of the rear power amplifiers while the center speaker is driven by the other power amplifier when using the Dolby surround mode, and the rear speakers are respectively driven by the two rear power amplifiers when using a surround mode other than the Dolby surround mode.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: August 28, 1990
    Assignee: Pioneer Electronic Corporation
    Inventors: Akira Tasaki, Tomohiro Takegawa