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US Patent: 15,085
Mode of sounding whistles for fog-signals
Patentee:
Rufus Porter (exact or similar names) - Washington, DC

USPTO Classifications:
116/108

Tool Categories:
transportation : nautical : nautical fog signals

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Newton F. Hart
N. H. Starr
Patent Dates:
Granted: Jun. 10, 1856

Patent Pictures:
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