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US Patent: 1,750,047
Air-cooling apparatus
Patentee:
Gustave A. Metzger (exact or similar names) - Belleville, IL

USPTO Classifications:
160/176.10V, 160/900, 261/103

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: May 31, 1928
Granted: Mar. 11, 1930

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Columbia Mfg. Co.
Description:
"This invention relates to air cooling apparatus designed to be placed in openings in dwellings or other buildings such as windows, or doors, the air passing through said openings being cooled thereby." The patent is of interest because the inventor had been president of Columbia Mfg. Co. of Belleville, which made pedestal grinders among its products.

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