Extension of letters patent: should Congress provide, by general legislation, for the extension of letters patent, in proper cases, beyond the terms of original grant?.

Edson, Joseph R. Extension of letters patent: should Congress provide, by general legislation, for the extension of letters patent, in proper cases, beyond the terms of original grant?. Washington: G.P.O. 1905; Patents & Trademarks; 78 p. 23 cm.