Photocopy of duplicate patents for invention, improvement an - Lot 68

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Lot n° 68
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Photocopy of duplicate patents for invention, improvement an - Lot 68
Photocopy of duplicate patents for invention, improvement and importation established by the laws of January 7 and May 25, 1791 issued to Mr BREGUET nephew and company, mentioning research for a clock topped by a watch (pendule sympathique), dated at the end of the document October 7, 1833.
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