She applied for a patent in 1846 , and soon afterward sold the right to employ it to manufacturer A. Perin & Company of Paris .
Nearly 40 years passed before Frenchwoman Anne Paulin Crepin devised a welding technique overcoming this hurdle .
Anne Paulin Crepin applied for a patent in 1846 , and soon afterward sold the right to employ it to manufacturer A. Perin & Company of Paris .
Nearly 40 years passed before Frenchwoman Anne Paulin Crepin devised a welding technique overcoming this hurdle .