French, Champagne Seal, Theophile Roederer & Co (1864)
Obv: B on scroll-work, inscription: BREVETÉS S.G.D.G.
Rev: Inscription: THEOPHILE ROEDERER & CIE REIMS MAISON FONDEE EN 1864.
Weight: 10.62 g.
Diameter: 22.49 mm.
"BREVETÉ S.G.D.G." is a historical French patent marking indicating that a product is patented but not guaranteed by the government. It was a common phrase in the late 19th and early 20th centuries, used to signify intellectual property protection without implying any official government endorsement. The decree establishing "BREVETÉ S.G.D.G." reflects Napoleon Bonaparte's broader efforts to reform and modernize French law, including intellectual property rights. The phrase remains an important historical reference to the evolution of patent law and the commercialization of innovation in the 19th century.