TY - GEN AU - Tergau, Enno, ID - 8280 KW - Trademarks. KW - MARKS : OBLIGATION TO USE AND WORK (UTILITY) T1 - Compulsory use of German trademarks after January 1, 1973 :statutory bases, objects to be attained, and anticipated practical consequences / TI - Compulsory use of German trademarks after January 1, 1973 :statutory bases, objects to be attained, and anticipated practical consequences / VL - 1972 Vol 62 No 6 pages 505-519 ER -