Extract from the Register of European Patents

EP Citations: EP0220772

Cited inSearch
Type:Patent literature
Publication No.:US3211540  [AD]
 (COLE HENRY B);
Type:Patent literature
Publication No.:DE2240078  [A]
 (OWENS ILLINOIS INC);
Type:Patent literature
Publication No.:US3626040  [A]
 (NAGAO KAZUYOSHI, et al)