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Chord entry keying of data fields

  • US 4,680,572 A
  • Filed: 12/14/1981
  • Issued: 07/14/1987
  • Est. Priority Date: 12/14/1981
  • Status: Expired due to Term
First Claim
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1. A keyboard system having a plurality of data keys and function keys arranged in a manner to be operated by one or both hands, and logic means permitting chord entry keying of characters into the keyboard upon substantially simultaneous depression of more than one key of the keyboard wherein data is entered upon depression of one or more data keys and upon depression of a function key within a predetermined time frame prior to or after the depression of the last data key.

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