Compact electronic calculator

Details Compact electronic calculator Compact electronic calculator

1973-11-09

1976-06-15

Malzahn, David H.

Registers

Transfer mechanism

Traveling pawl

G06F 152

Patent

active

039639061

ABSTRACT:
A compact electronic calculator having an input circuit defined by a plurality of lead switches mounted beneath an operative surface for selective actuation by a manually manipulatable permanent magnet. The calculator further includes a calculating circuit coupled to said input circuit and formed from LSI elements, display means formed from liquid crystal display elements and a battery power source.

REFERENCES:
patent: 2546647 (1951-03-01), Marble et al.
patent: 3129302 (1964-04-01), Postel
patent: 3469242 (1969-09-01), Eachus et al.
patent: 3499112 (1970-03-01), Heilmeier et al.
patent: 3506939 (1970-04-01), Hesser et al.
patent: 3548179 (1970-12-01), Kimura et al.
patent: 3652148 (1972-03-01), Wysocki et al.
patent: 3713056 (1973-01-01), Hosokawa
patent: 3750062 (1973-07-01), Goto
patent: 3781865 (1973-12-01), Yamazaki
patent: 3819921 (1974-06-01), Kilby et al.

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