Patent and trade mark laws of the world
Singer, Berthold
Patent and trade mark laws of the world by B. Singer... - Chicago [Hammond press, W. B. Conkey company] 1911. - 2 p. b., 7-539 p. 24 cm.
11006040
Patent laws and legislation
Trademarks
Patente de invención Legislación. Marcas de fabricas.
K89 S5 1911
Patent and trade mark laws of the world by B. Singer... - Chicago [Hammond press, W. B. Conkey company] 1911. - 2 p. b., 7-539 p. 24 cm.
11006040
Patent laws and legislation
Trademarks
Patente de invención Legislación. Marcas de fabricas.
K89 S5 1911