Inventor · disambiguated record
Keith A. Engstrom
Also filed as: ENGSTROM KEITH · ENGSTROM KEITH A · ENGSTROM KEITH ALLEN
9 granted patents·3 pending applications·185 citations·filing 1974–2002
89Inventor score
Top patents by PatentIndex Score
12 records- 0191US4479392AForce transducerILLINOIS TOOL WORKS·Filed 1983·Granted Oct 30, 1984·65 cites·12 claims
- 0282US4611406AEnclosure for electrical data input apparatusILLINOIS TOOL WORKS·Filed 1984·Granted Sep 16, 1986·61 cites·1 claims
- 0365US3978474AKeyboard with n-key lockout and two-key rollover protectionILLINOIS TOOL WORKS·Filed 1975·Granted Aug 31, 1976·13 cites·15 claims
- 0453US4517553AN-Key rollover keyboardILLINOIS TOOL WORKS·Filed 1974·Granted May 14, 1985·9 cites·27 claims
- 0544US2003063997A1Monitoring sterilant concentration in a sterilization processFiled 2002·Application pending·0 cites
- 0643US5446259AMethod for producing opto-electronic circuit using laser-trimming deviceALPS ELECTRIC USA·Filed 1993·Granted Aug 29, 1995·11 cites·3 claims
- 0743US2002081228A1Monitoring sterilant concentration in diffusion-restricted regions as a basis for parametric releaseFiled 2001·Application pending·0 cites
- 0843US2002122744A1Apparatus and method for monitoring of oxidative gas or vaporFiled 2001·Application pending·0 cites
- 0942US5541623ATemperature compensated opto-electronic circuit and mouse using sameALPS ELECTRIC USA·Filed 1994·Granted Jul 30, 1996·15 cites·5 claims
- 1040US4028696ADouble depression magnetic keyswitchILLINOIS TOOL WORKS·Filed 1976·Granted Jun 7, 1977·5 cites·12 claims
- 1134US4704601AKeyboard data entry system with hysteresisILLINOIS TOOL WORKS·Filed 1985·Granted Nov 3, 1987·3 cites·17 claims
- 1230US4390866AKeyboard with electronic hysteresisILLINOIS TOOL WORKS·Filed 1981·Granted Jun 28, 1983·3 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →