Method of making an electronic calculator

Details Method of making an electronic calculator Method of making an electronic calculator

1977-11-08

1979-02-20

Malzahn, David H.

Boots, shoes, and leggings

29577C, 29626, 174 685, H05K 100

Patent

active

041410750

ABSTRACT:
Electronic calculators are manufactured by affixing conductors on an insulated substrate, by attaching tape-mounted semiconductor logic and display devices to selected conductors and by interconnecting the conductors with a keyboard. By using the method disclosed, the number of holes provided in the insulated substrate can be reduced or the use of such holes eliminated. Various embodiments of methods of manufacturing calculators are disclosed, along with the structure of such calculators.

REFERENCES:
patent: 3780431 (1973-12-01), Feeney
patent: 3833838 (1974-09-01), Christiansen
patent: 3908075 (1975-09-01), Jackson et al.
patent: 3911234 (1975-10-01), Kotaka
patent: 3956820 (1976-05-01), Swartz et al.
patent: 3981076 (1976-09-01), Nicolas
patent: 4049903 (1977-09-01), Kobler
patent: 4063993 (1977-12-01), Burns

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