INPADOC Patent Family US4912531 (Original INPADOC file)
Publication No. Publication date Filing No. Priority Status Source Data
US 4912531A 1990-03-27 US 62655184A 19840629 US 62655184A 19840629 Expired National register (PAIR)
JP 61081662A 1986-04-25 JP 14382685A 19850629 US 62655184A 19840629 Unknown Espacenet
JP 6056884B 1994-07-27 JP 14382685A 19850629 US 62655184A 19840629 Unknown JAPIO
JP 1930626C 1995-05-12 JP 14382685A 19850629 US 62655184A 19840629 Unknown JAPIO

INPADOC Legal Status 
US4912531 (Expired)
No INPADOC legal data



JP61081662 (Unknown)
No INPADOC legal data



JP6056884 (Unknown)
No INPADOC legal data



JP1930626 (Unknown)
No INPADOC legal data