Protective case for a calculator or the like

Printing and office machinery – Typewriter or calculator – Calculator

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D 3 301

Patent

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D02831384

REFERENCES:
patent: D236488 (1975-08-01), Fossella
patent: D245455 (1977-08-01), Cathey
patent: D275822 (1984-10-01), Catland et al.
patent: 4071065 (1978-01-01), Halbich
patent: 4259568 (1981-03-01), Dynesen
patent: 4322835 (1982-03-01), Ernst et al.
patent: 4424899 (1984-01-01), Rosenberg
patent: 4458813 (1984-07-01), Tushinsky et al.

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