Système et parapluie à fermeture automatique
He had obtained a French patent, as well as a US patent for his invention. [2]
In his US patent the inventor explained:
This invention relates to improvements in umbrellas and sun-shades; and it consists, first, in a construction of a spring-joint uniting the ribs to the stretchers, whereby the stretchers and ribs are held snugly against the stick when the umbrella is closed ...
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[2] FR patent No 137,250, US patent No 235,943
[3] LU patent No 34
(08/02/2021)