Electronic calculating machine

Details Electronic calculating machine Electronic calculating machine

1975-07-30

1977-03-15

Burke, Wallace R.

Printing and office machinery

Printing equipment

Hand held or manipulated

D1801

Patent

active

D02437015

REFERENCES:
patent: D228291 (1973-09-01), Maeda et al
patent: D229065 (1973-11-01), Maeda et al.
patent: D232943 (1974-09-01), Maeda
patent: D232944 (1974-09-01), Maeda
patent: D233440 (1974-10-01), Fossella et al.

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