DC

Donald E. Charles

SI Siemens Industry: 6 patents #57 of 836Top 7%
SA Siemens Building Technologies Ag: 4 patents #6 of 170Top 4%
BL Baxter Travenol Laboratories: 3 patents #84 of 589Top 15%
LS Landis & Staefa: 1 patents #2 of 8Top 25%
SA Siemens Schweiz Ag: 1 patents #109 of 341Top 35%
Overall (All Time): #222,360 of 4,157,543Top 6%
20
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
10213633 Stored energy for failsafe valve 2019-02-26
10109071 System for detecting a position of a fume hood sash 2018-10-23
10110158 Temperature compensation for DC motor PWM applications 2018-10-23
9791486 Apparatus for increasing resolution of resistance sensing 2017-10-17
9637906 Urine attachment for toilets 2017-05-02
9541378 Sash position determining system Guy P. Caliendo 2017-01-10
9527119 System for detecting a position of a fume hood sash 2016-12-27
9429606 Increasing resolution of resistance measurements 2016-08-30
D701961 Portable imaging device 2014-04-01
D692139 Articulated imaging device 2013-10-22
D690421 Articulated MRI device 2013-09-24
D685479 Articulated MRI device 2013-07-02
7598628 Automated bypass method and apparatus Ronald Zver, Edward H. Smith 2009-10-06
7295451 Switching power supply having dual current feedback 2007-11-13
7023163 Fail-safe electric actuator using high voltage capacitors Matthew D. Cook 2006-04-04
5934554 Room temperature sensor and thermostat control device Christopher Wojtowicz, Kenneth F. Wolfinger 1999-08-10
5816492 Room temperature sensor and thermostat control device Christopher Wojtowicz, Kenneth F. Wolfinger 1998-10-06
4468562 Dosimeter for photometric applications Michael F. Wicnienski 1984-08-28
4426612 Battery charging and testing circuit Michael F. Wicnienski 1984-01-17
4403185 Process and device for detecting frequency variations 1983-09-06