Extract from the Register of European Patents

EP Citations: EP0304132

Cited inSearch
Type:Patent literature
Publication No.:US3360574  [X]
 (MANUEL BALLESTER, et al);
Type:Patent literature
Publication No.:US3671469  [A]
 (DOORENBOS HAROLD E);
Type:Patent literature
Publication No.:US3413241  [A]
 (LE SUER WILLIAM M, et al)