Extract from the Register of European Patents

EP Citations: EP0424864

Cited inSearch
Type:Patent literature
Publication No.:DE2658208  [A]
 (PARSONS CO RALPH M);
Type:Patent literature
Publication No.:US3488960  [A]
 (KIRKPATRICK ALTON);
Type:Patent literature
Publication No.:DE3627834  [A]
 (SIEMENS AG [DE])