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US Patent: 3,332,317
Chalk screen image projector
Patentees:
Frank R. Torrey - Silver Springs, MD
Arthur W. Carlson - Muskegon, MI
Eugene F. Peckman - Pittsburgh, PA

USPTO Classifications:
353/44, 353/98, 434/408

Tool Categories:

Assignees:
E. H. Sheldon & Co. - Muskegon, MI

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: May 19, 1965
Granted: Jul. 25, 1967

Patent Pictures:
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"Vintage Machinery" entry for E. H. Sheldon & Co.

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