Calculator or similar article

Details Calculator or similar article Calculator or similar article

1975-03-19

1977-08-09

Burke, Wallace R.

Printing and office machinery

Printing equipment

Hand held or manipulated

D1801

Patent

active

D02453703

REFERENCES:
patent: D229065 (1973-11-01), Maeda et al.
patent: D236269 (1975-08-01), Shu-Keung
Office Products, Apr. 1974, p. 62, Toshiba Model BC-0808B calculator.
Merchandising Week, Sept. 11, 1972, p. 36, Panasonic Rectangular Portable.

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