Inventor
JOHNSON DELMAR R
US7 patents
Patents
7 patentsUS4174890ANov 20, 1979
Electronically controlled microfilm photographic image utilization device
BELL & HOWELL CO34 citations91
US4324484AApr 13, 1982
Microfilm filing system
BELL & HOWELL CO23 citations80
US4110020AAug 29, 1978
Electronically controlled microfilm photographic image utilization device
BELL & HOWELL CO25 citations80
US4624558ANov 25, 1986
Microimage recorder
BELL & HOWELL CO12 citations71
US4198157AApr 15, 1980
Automatic microfilm camera operated responsive to data input at a computer terminal
BELL & HOWELL CO11 citations71
US4149784AApr 17, 1979
Roll film reader/printer with manually insertable discrete film
BELL & HOWELL CO6 citations61
US4087175AMay 2, 1978
Automatic microfilm camera operated responsive to data input at a computer terminal
BELL & HOWELL CO6 citations60