US Patent: 97,894
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| Improved apparatus for extinguishing fires by means of chemical agents
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Patentee:
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| Joseph W. Douglas (exact or similar names) - Middletown, CT |
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Patent Dates:
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| Granted: |
Dec. 14, 1869 |
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Jeff Joslin
Vintage Machinery entry for W. & B. Douglas
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Description: |
| "When it is desired to use such a chemical as does not evolve gas till thrown with the water upon the fire, that which forms the subject of patent 85,434, dated December 29, 1868, may be used." |
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