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ACKNOWLEDGEMENTS |

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-Luis Nadeau (world renowned specialist) for his kindness and
advice (read his article).
-Valérie Marchal (curator - I.N.P.I. archives) for the authorization to
publish the patent extracts.
-Marie-Claude Delmas (I.N.P.I. Library direction) for her help and dedication.
-Dusan Stulik (Getty, Malibu) for suggesting Internet publication of this
work.
-Julien Souloumiac, for his friendly advice.
CONTRIBUTORS' LIST :
| IMBS Constantin
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| Nadeau Luis
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| Pieuchard Marion
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| T. C.
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