Calculator flap book cover

Details Calculator flap book cover Calculator flap book cover

1988-05-31

1992-06-02

Burke, Wallace R.

Office supplies; artists and teachers materials

Book, album or cover

Patent

active

D03266818

REFERENCES:
patent: D246205 (1977-10-01), Lewis
patent: D250592 (1978-12-01), Testro et al.
patent: D300227 (1989-03-01), Noguchi
patent: D303809 (1989-10-01), Klein
patent: 591746 (1897-10-01), Dusart, Jr.

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