172a - François SCHWEISTHAL (1822 - 1899) (2) 
SCHWEISTHAL was a brasseur in Bettborn. He had already applied for a patent in 1862, without success (No 75).
In October 1875 he wrote to the Government requesting a patent relating to a:
Système de tonneaux en ardoise
The Government asked SCHWEISTHAL to fulfil the legal requirements, such as: providing a complete description, drawings, specifying the duration desired for the patent, etc …
SCHWEISTHAL did not respond and did not pursue his application.