Inventor
PARKER ROBERT R
15 patents
⚠️ This page may combine multiple inventors who share the name “PARKER ROBERT R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BELL & HOWELL CO
14 patentsUS4578718AMar 25, 1986
Control arrangement and method for video tape recorder
BELL & HOWELL CO153 citations97
US4576578AMar 18, 1986
Interactive training apparatus
BELL & HOWELL CO204 citations96
US4283658AAug 11, 1981
Projection lamp control arrangement
BELL & HOWELL CO42 citations92
US4568161AFeb 4, 1986
Computer controlled slide projector interface arrangement
BELL & HOWELL CO30 citations90
US4041538AAug 9, 1977
Low noise magnetic transducer preamplifier having flat response
BELL & HOWELL CO9 citations73
US4698770AOct 6, 1987
Computer controlled video device and slide projector interface arrangement
BELL & HOWELL CO19 citations72
US4432618AFeb 21, 1984
Tray drive and slide change control apparatus for slide projector
BELL & HOWELL CO8 citations72
US4122613AOct 31, 1978
Operator responsive audio-visual teaching apparatus
BELL & HOWELL CO14 citations71
US4470675ASep 11, 1984
Random access control apparatus and method for slide projector
BELL & HOWELL CO8 citations69
US4452518AJun 5, 1984
Slide projector control apparatus
BELL & HOWELL CO13 citations69
US4198138AApr 15, 1980
Automatic focusing system for projectors
BELL & HOWELL CO5 citations63
US4440478AApr 3, 1984
Slide tray position sensing arrangement for slide projector apparatus utilizing two slide tray types
BELL & HOWELL CO5 citations62
US4218115AAug 19, 1980
Changeover control arrangement for projection apparatus
BELL & HOWELL CO4 citations62
US4202611AMay 13, 1980
Projector apparatus and control arrangement
BELL & HOWELL CO6 citations62