Extract from the Register of European Patents

EP Citations: EP0487931

Cited inSearch
Type:Patent literature
Publication No.:US2777674  [X]
 (WAKEMAN ALDEN H);
Type:Patent literature
Publication No.:FR2355265  [X]
 (CHAFFOTEAUX ET MAURY [FR]);
Type:Patent literature
Publication No.:GB2141814  [X]
 (APV INT LTD)