TY - GEN T1 - Conceptual separability and copyright in the designs of useful articles / AU - Perlmutter, Shira, VL - 1990 Vol 37 No 3 pages 339-381 N1 - (413). ID - 1308 KW - Copyright. KW - COPYRIGHT : WORKS OF APPLIED ART, DESIGNS AND MODELS AND MODERN ART TI - Conceptual separability and copyright in the designs of useful articles / ER -