Folding rear projection slide viewer

Photography and optical equipment – Projector or viewer – With provision for transparency magazine

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Patent

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D02897695

REFERENCES:
patent: D173647 (1954-12-01), Elle et al.
patent: D213851 (1969-04-01), Karow et al.
patent: D217103 (1970-04-01), Field et al.
patent: D219176 (1970-11-01), Single
patent: D264091 (1982-04-01), Link et al.
patent: D267251 (1982-12-01), Link et al.
patent: D267328 (1982-12-01), Runyan
patent: 3804504 (1974-04-01), Scott

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