INPADOC Patent Family US4992999
Publication No.
Publication date
Filing No.
Priority
Status
US4992999A
1991-02-12
US56956066A
US56956066A 19660728
Expired
INPADOC Legal Status
US4992999A (Expired)
1990-12-13
INFORMATION ON STATUS: PATENT GRANT
Free Format Text PATENTED CASE
Updated on July 22, 2019
