Patents by Inventor Koiti Oda

Koiti Oda 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: 4321046
    Abstract: An electronic learning aid is disclosed, which automatically develops and displays problems, and functions to compare an answer introduced by a student with a correct answer stored in the electronic learning aid. A mode selection switch is provided for selectively placing the electronic learning aid in an exercise mode and in an examination (test) mode. In the exercise mode, a symbol display is energized for displaying information as to whether the introduced answer is correct or not upon every introduction of the answer by the student. In the examination (test) mode, the symbol display is not conducted, and a percentage score is displayed after completion of a series of problems.
    Type: Grant
    Filed: November 28, 1979
    Date of Patent: March 23, 1982
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koiti Oda, Yoshiro Kataoka, Takashi Sakaue