Patents by Inventor Akihiro Yamataka

Akihiro Yamataka 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).

  • Computer for calculating compound interest
    Patent number: 4486849
    Abstract: A computer capable of performing the compound interest operation of (1+i).sup.n where i=interest rate and n=term.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: December 4, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isao Harigaya, Akihiro Yamataka
  • Date data computer
    Patent number: 4276606
    Abstract: A computer or calculator for calculating dates or a period of days, wherein a selector device is provided for selecting any one of a plurality of predetermined sequences or orders in which input date data may be manually entered.
    Type: Grant
    Filed: January 26, 1979
    Date of Patent: June 30, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isao Harigaya, Akihiro Yamataka
  • Electronic apparatus
    Patent number: 4209850
    Abstract: A digital electronic apparatus is provided for allowing easy copying from a first memnory to a second memory. Said copying operation can be arbitrarily controlled from a key entry means. Said first and second memories are constructed in the form of a pack detachable from said electronic apparatus. The copying operation cannot be easily performed by an unauthorized person as the information including the copying instruction is contained in a pack.
    Type: Grant
    Filed: September 25, 1978
    Date of Patent: June 24, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigemitsu Tazaki, Akihiro Yamataka, Tsunenori Souma, Tadao Kusumoto
  • Computer having circuitry for rounding-off insignificant digits
    Patent number: 4149261
    Abstract: A computer capable of rounding a number, such as by raising, truncating or chopping the digits of the number which are lower than a specified digit position above a decimal point.
    Type: Grant
    Filed: March 15, 1977
    Date of Patent: April 10, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isao Harigaya, Akihiro Yamataka