US Patent: 27,040
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| Improved steam-trap
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Patentee:
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| Frank Douglas (exact or similar names) - Norwich, CT |
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Patent Dates:
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| Granted: |
Feb. 07, 1860 |
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Jeff Joslin
Vintage Machinery entry for C. B. Rogers & Co.
Vintage Machinery entry for Frank Douglas Machinery Co.
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Description: |
| An article in 1860-02-18 Scientific American about this invention concludes, "The patent for this invention was issued... to Frank Douglas, who has sold half of it to C. B. Rogers & Co., and persons desiring further information in relation to it, may address Douglas, Rogers & Co., Norwich, Conn." |
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