Patents Assigned to Takao Ooi wa
  • Patent number: 4611102
    Abstract: Four push portions are provided in a switch knob in a switch case. Four pairs of opposed contact switches are disposed in the switch case and opposed to the push portions. A blocking member for preventing the push portions from being pushed in are also provided in the switch case. When one of the push portions is pushed in, the other push portion opposite to the one push portion is mechanically prevented from being simultaneously pushed in.
    Type: Grant
    Filed: December 27, 1984
    Date of Patent: September 9, 1986
    Assignee: Takao Ooi wa
    Inventor: Shoji Ishida