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Keyboard for data entry on control purposes

  • US 4,897,649 A
  • Filed: 12/02/1986
  • Issued: 01/30/1990
  • Est. Priority Date: 12/02/1986
  • Status: Expired due to Fees
First Claim
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1. A keyboard for data entry or control, comprising a base;

  • sets of two or more keys mounted on the base, each key including a roller having a superficial touch area with the superficial touch area for each roller of a set of keys being arranged for receiving the tip of a finger of a hand of an operator thereover and configured so that a fingertip of an operator may easily move thereover, the superficial touch areas of each set being sized and clustered together whereby substantially the entire superficial touch areas of a respective set of keys are substantially simultaneously comprehended by and selectively operable by a single finger tip of an operator; and

    means controlled by respective keys of the sets of keys.

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