Extract from the Register of European Patents

EP Citations: EP0202195

Cited inSearch
Type:Patent literature
Publication No.:EP0023891  [Y]
 (CIBA GEIGY AG [CH]);
Type:Patent literature
Publication No.:EP0112524  [Y]
 (NIHON TOKUSHU NOYAKU SEIZO KK [JP]);
Type:Patent literature
Publication No.:US2712031  [A]
 (HUFFMAN MAX N)