US Patent: 1,750,047
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| Air-cooling apparatus
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Patentee:
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| Gustave A. Metzger (exact or similar names) - Belleville, IL |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 31, 1928 |
| Granted: |
Mar. 11, 1930 |
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Jeff Joslin
Vintage Machinery entry for Columbia Mfg. Co.
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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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