General purpose calculator having selective data storage, data c

Details General purpose calculator having selective data storage, data c General purpose calculator having selective data storage, data c

1975-04-08

1977-11-22

Malzahn, David H.

Boots, shoes, and leggings

G06F 1300

Patent

active

040597504

ABSTRACT:
A battery-powered hand-held calculator for performing arithmetic, trigonometric, and logarithmic functions and displaying the results thereof is provided with the capability of automatically storing the last displayed number in an auxiliary storage register whenever the next succeeding function to be performed would destroy that number. That number may be recalled from the auxiliary storage register by simply depressing a prefix key and a Last-X function key.

REFERENCES:
patent: 3641329 (1972-02-01), DeSandre et al.
patent: 3762637 (1973-10-01), Hernandez
patent: 3781820 (1973-12-01), Cochran et al.
patent: 3863060 (1975-01-01), Rode et al.

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