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XC Patent: XC-6
Machine or instrument called 'Loch Terrestre,' for accurately ascertaining the number of rotatory motions or revolutions of carriage-wheels, millstones, &c.
Patentee:
Charles Laurier - La Chenaye Parish, Montréal, QC Canada

USPTO Classifications:

Tool Categories:
industrial tools : rpm speed gauges and tachometers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Oct. 31, 1826

Patent Pictures:
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