Folder with calculator

Office supplies; artists and teachers materials – Book – album or cover

Patent

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D18 7, D 3 56

Patent

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D03356850

REFERENCES:
patent: D241381 (1976-09-01), Ganier
patent: D246205 (1977-10-01), Lewis
patent: D294270 (1988-02-01), Hung
patent: D300227 (1989-03-01), Noguchi
patent: D308049 (1990-05-01), Dennett
Jacobs Gardner, .COPYRGT. 1989, p. 352, the T1-1768 Tilt-Top Solar Calculator.

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