INPADOC Patent Family US4289287
Publication No.
Publication date
Filing No.
Priority
Status
US4289287A
1981-09-15
US80761877A
US62133075A 19751010
US80761877A 19770617
Expired
INPADOC Legal Status
US4289287A (Expired)
1981-07-01
INFORMATION ON STATUS: PATENT GRANT
Free Format Text PATENTED CASE
Updated on July 22, 2019
