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US Patent: 284,382
Circuit and Apparatus for Electric Temperature and Pressure Indicator
Patentee:
Charles L. Clarke (exact or similar names) - New York, NY

USPTO Classifications:
318/10, 388/836

Tool Categories:
gauges : vacuum and pressure gauges
gauges : temperature gauges

Assignees:
Robert Hewitt - New York, NY

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Jan. 19, 1883
Granted: Sep. 04, 1883

Patent Pictures:
USPTO (New site tip)
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