Inventor

FESLER ROBERT M

US3 patents

Patents

3 patents

US5504544AApr 2, 1996

Projector with multiple lamp light source

MINNESOTA MINING & MFG47 citations91

US5296882AMar 22, 1994

Overhead projector with catadioptric fresnel lens

MINNESOTA MINING & MFG16 citations81

US5568324AOct 22, 1996

Overhead projector with catadioptric fresnel lens

MINNESOTA MINING & MFG10 citations72