Electronically programmable calculator with memory package

Details Electronically programmable calculator with memory package Electronically programmable calculator with memory package

1985-03-22

1988-01-26

Malzahn, David H.

Boots, shoes, and leggings

364200, G06F 1202

Patent

active

047220651

ABSTRACT:
In an electronically programmable calculator with a memory package, a plurality of memory packages are detachably loaded into a housing. Program data is written in at least one of the plurality of memory packages, and variable data is written in at least one other thereof. The contents of each memory package is always maintained by a built-in battery. The memory packages can be replaced with other memory packages, as needed.

REFERENCES:
patent: 3839630 (1974-10-01), Olander, Jr. et al.
patent: 4063221 (1977-12-01), Watson et al.
patent: 4091446 (1978-05-01), Demonte et al.
patent: 4455618 (1984-06-01), Walden et al.
patent: 4516218 (1985-05-01), Hamilton
Hewlett, Packard HP-41C, No. 5952-9712, 4/81, pp. 1-13.

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