Calculator having preprogrammed user-definable functions

Details Calculator having preprogrammed user-definable functions Calculator having preprogrammed user-definable functions

1973-11-26

1977-07-19

Malzahn, David H.

Registers

Transfer mechanism

Traveling pawl

G06F 1502

Patent

active

040370925

ABSTRACT:
A calculator has one or more keys which initiate the performance of user-defined subroutines. When the calculator is turned on, the calculator memory is programmed with a predetermined subroutine which may subsequently be changed or replaced by the user.

REFERENCES:
patent: 3588841 (1971-06-01), Ragen
patent: 3760171 (1973-09-01), Wang et al.

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