U.S. Utility Patent 2,641,320 (US2641320A)

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Provided by the ASK Keyboard Patents database

Applied 13th July 1949

Published 9th June 1953

Expired 9th June 1970

More informaion

Name	Composite keyboard
Inventors	Reynold B. Johnson
Assignees	IBM
Description	An invention of an alphanumeric keypunch keyboard layout that integrates a telephone-arrangement overlay numeric keypad, numeric shift and keypunch-specific function keys onto a keyboard's typewriter section. It was first implemented on the IBM 024 Card Punch and 026 Printing Card Punch Combination Keyboards. It also serves as the basis for many IBM data entry terminal keyboard layouts.

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