Patent fundamentals by Leon H. Amdur.
Amdur, Leon H.
Patent fundamentals by Leon H. Amdur. - New York Chemical Publishing 1941 - 305p., 80 pict. 20cm.
Patents Trademarks.
608 / A42P
Patent fundamentals by Leon H. Amdur. - New York Chemical Publishing 1941 - 305p., 80 pict. 20cm.
Patents Trademarks.
608 / A42P