Inventor
ENGSTROM KEITH A
US7 patents
⚠️ This page may combine multiple inventors who share the name “ENGSTROM KEITH A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ILLINOIS TOOL WORKS
5 patentsUS4611406ASep 16, 1986
Enclosure for electrical data input apparatus
ILLINOIS TOOL WORKS61 citations95
US4479392AOct 30, 1984
Force transducer
ILLINOIS TOOL WORKS65 citations93
US4517553AMay 14, 1985
N-Key rollover keyboard
ILLINOIS TOOL WORKS9 citations71
US4704601ANov 3, 1987
Keyboard data entry system with hysteresis
ILLINOIS TOOL WORKS3 citations60
US4390866AJun 28, 1983
Keyboard with electronic hysteresis
ILLINOIS TOOL WORKS3 citations60