Whats the most profitable ever Canadian exclusive rights?
Answers:
Undoubtedly it is the 1874 official document for the electric hurricane lantern bulb by Henry Woodward and Matthew Evans. They sold this exclusive rights to somewhat specified American name Thomas Edison, who educated it, and go on to vend a few standard lamp bulbs.
Unfortunately, Edison's refinement infringed an English rights owned by Joseph Swan, but that be settled by taking Swan on as Edison's partner.
Still, the original Canadian official document, which predated Swan's government grant by 4 years, be a justly successful one by adjectives standards.