Inventor

BARTMAN GERRIT E

NL2 patents

Patents

2 patents

US4891053AJan 2, 1990

Method of manufacturing biconvex lens elements and element formed thereby

PHILIPS CORP18 citations64

US4398935AAug 16, 1983

Method and device for the high-precision manufacture of glass articles, in particular lenses

PHILIPS CORP5 citations57