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US Patent: 79,708
Steam Boiler Indicator
Patentee:
Charles S. Watson (exact or similar names) - Philadelphia, PA

USPTO Classifications:
137/213, 137/406

Tool Categories:
propulsion and energy : steam apparatus : low water alarms

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Granted: Jul. 07, 1868

Patent Pictures:
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