Patents Assigned to Schenk & Co.
  • Patent number: 4857887
    Abstract: The keyboard comprises piezoelectric crystal elements arranged between laminates provided with conducting strips. A voltage is generated when pressure is applied to the elements. The keyboard is tensionless in its rest state and contains no unwanted air spaces.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: August 15, 1989
    Assignee: Schenk & Co.
    Inventor: Thomas Iten