Inventor
GREIS ULRICH
5 patents
Patents
5 patentsUS4172219AOct 23, 1979
Daylight projection screen and method and apparatus for making the same
AGFA GEVAERT AG76 citations94
US4076384AFeb 28, 1978
Rear-projection viewing screen
AGFA GEVAERT AG51 citations91
US3948660AApr 6, 1976
Method for the manufacture of fresnel lenses using light-sensitive materials
AGFA GEVAERT AG15 citations71
US4032343AJun 28, 1977
Method for production of rotationally symmetric non-spherical optical elements
AGFA GEVAERT AG13 citations67
US4009386AFeb 22, 1977
Method and arrangement for automatically focussing an objective onto a subject, using autocollimation
AGFA GEVAERT AG6 citations60