Inventor
NORRELL DONALD L
4 patents
Patents
4 patentsUS4370650AJan 25, 1983
Tone detection circuitry
MINNESOTA MINING & MFG11 citations69
US4280145AJul 21, 1981
Non-linear, multi-speed, bi-directional facsimile subscan drive control
MINNESOTA MINING & MFG12 citations69
US4366509ADec 28, 1982
Facsimile apparatus with multiple scanning and printing elements
MINNESOTA MINING & MFG12 citations67
US4079297AMar 14, 1978
Open loop facsimile phasing system and method
MINNESOTA MINING & MFG5 citations58