Inventor · disambiguated record
Donald E. Charles
Also filed as: CHARLES DONALD · CHARLES DONALD E · CHARLES DONALD M
20 granted patents·1 pending application·316 citations·filing 1982–2017
95Inventor score
Files withCHARLES DONALD5SIEMENS BUILDING TECH AG4SIEMENS INDUSTRY INC4BAXTER TRAVENOL LAB3CHARLES DONALD E2
Top patents by PatentIndex Score
21 records- 0195US9637906B1Urine attachment for toiletsCHARLES DONALD·Filed 2015·Granted May 2, 2017·12 cites·9 claims
- 0288US10110158B1Temperature compensation for DC motor PWM applicationsSIEMENS SCHWEIZ AG·Filed 2017·Granted Oct 23, 2018·3 cites·10 claims
- 0383US7295451B2Switching power supply having dual current feedbackSIEMENS BUILDING TECH AG·Filed 2006·Granted Nov 13, 2007·22 cites·20 claims
- 0482US10109071B2System for detecting a position of a fume hood sashSIEMENS INDUSTRY INC·Filed 2016·Granted Oct 23, 2018·3 cites·13 claims
- 0582US5934554ARoom temperature sensor and thermostat control deviceSIEMENS BUILDING TECH AG·Filed 1998·Granted Aug 10, 1999·67 cites·4 claims
- 0678US5816492ARoom temperature sensor and thermostat control deviceLANDIS & STAEFA INC·Filed 1996·Granted Oct 6, 1998·59 cites·20 claims
- 0776USD690421SArticulated MRI deviceCHARLES DONALD·Filed 2013·Granted Sep 24, 2013·18 cites·1 claims
- 0873US9791486B2Apparatus for increasing resolution of resistance sensingSIEMENS INDUSTRY INC·Filed 2016·Granted Oct 17, 2017·1 cites·9 claims
- 0973US9527119B2System for detecting a position of a fume hood sashSIEMENS INDUSTRY INC·Filed 2012·Granted Dec 27, 2016·1 cites·7 claims
- 1072USD685479SArticulated MRI deviceCHARLES DONALD·Filed 2012·Granted Jul 2, 2013·15 cites·1 claims
- 1170US4426612ABattery charging and testing circuitBAXTER TRAVENOL LAB·Filed 1982·Granted Jan 17, 1984·34 cites·24 claims
- 1269USD692139SArticulated imaging deviceCHARLES DONALD·Filed 2013·Granted Oct 22, 2013·16 cites·1 claims
- 1368US9541378B2Sash position determining systemCHARLES DONALD E·Filed 2013·Granted Jan 10, 2017·3 cites·22 claims
- 1466US4468562ADosimeter for photometric applicationsBAXTER TRAVENOL LAB·Filed 1982·Granted Aug 28, 1984·20 cites·4 claims
- 1564US7023163B2Fail-safe electric actuator using high voltage capacitorsSIEMENS BUILDING TECH AG·Filed 2004·Granted Apr 4, 2006·18 cites·12 claims
- 1656US7598628B2Automated bypass method and apparatusSIEMENS BUILDING TECH AG·Filed 2003·Granted Oct 6, 2009·12 cites·16 claims
- 1752US10213633B2Stored energy for failsafe valveSIEMENS INDUSTRY INC·Filed 2015·Granted Feb 26, 2019·0 cites·13 claims
- 1850US9429606B2Increasing resolution of resistance measurementsCHARLES DONALD E·Filed 2013·Granted Aug 30, 2016·0 cites·6 claims
- 1946US2005240410A1Method and system for recognising a spoken identification sequenceCHARLES DONALD M·Filed 2002·Application pending·0 cites
- 2045US4403185AProcess and device for detecting frequency variationsBAXTER TRAVENOL LAB·Filed 1982·Granted Sep 6, 1983·8 cites·1 claims
- 2142USD701961SPortable imaging deviceCHARLES DONALD·Filed 2013·Granted Apr 1, 2014·4 cites·1 claims
Join the waitlist — get patent alerts
Get an alert when Donald E. Charles files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →