Inventor
WALKER JAMES T
US33 patents
⚠️ This page may combine multiple inventors who share the name “WALKER JAMES T”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUPERTEX INC
9 patentsUS6304461B1Oct 16, 2001
DC power converter having bipolar output and bi-directional reactive current transfer
SUPERTEX INC85 citations98
US7564263B2Jul 21, 2009
High-speed logic signal level shifter
SUPERTEX INC26 citations92
US6841950B1Jan 11, 2005
Dimmable electrolumanescent lamp drivers and method therefor
SUPERTEX INC13 citations84
US7554378B2Jun 30, 2009
Fast DC coupled level translator
SUPERTEX INC7 citations74
US7538581B2May 26, 2009
Fast AC coupled level translator
SUPERTEX INC7 citations74
US7480191B2Jan 20, 2009
High speed logic level shifter
SUPERTEX INC7 citations73
US7659756B2Feb 9, 2010
MOSFET transistor amplifier with controlled output current
SUPERTEX INC4 citations63
US9837889B2Dec 5, 2017
Power converter with inductance invariance
SUPERTEX INC0 citations52
US9246378B2Jan 26, 2016
Method and apparatus for extending the power output range of a power converter used for a lighting system
SUPERTEX INC1 citations52
JOHNSON & SON INC S C
8 patentsUSD931503SSep 21, 2021
Jar
JOHNSON & SON INC S C7 citations84
USD932065SSep 28, 2021
Jar
JOHNSON & SON INC S C2 citations73
USD931504SSep 21, 2021
Jar
JOHNSON & SON INC S C2 citations73
US11407000B2Aug 9, 2022
Volatile material dispenser
JOHNSON & SON INC S C2 citations71
US10039851B2Aug 7, 2018
Wax melt system
JOHNSON & SON INC S C2 citations68
USD674475SJan 15, 2013
Wick
JOHNSON & SON INC S C1 citations62
US12246336B2Mar 11, 2025
Volatile material dispenser
JOHNSON & SON INC S C0 citations61
US12017244B2Jun 25, 2024
Volatile material dispenser
JOHNSON & SON INC S C0 citations61
AMFIT INC
4 patentsUS6205230B1Mar 20, 2001
Optical contour digitizer
AMFIT INC102 citations97
US7019529B2Mar 28, 2006
Electrostatic sensor device and matrix
AMFIT INC11 citations83
US6864687B2Mar 8, 2005
Electrostatic sensor device and matrix
AMFIT INC11 citations73
US8378689B2Feb 19, 2013
Electrostatic sensor device and matrix
AMFIT INC0 citations40
WALKER JAMES T
4 patentsUS4954970ASep 4, 1990
Video overlay image processing apparatus
WALKER JAMES T113 citations94
US8154898B2Apr 10, 2012
Current driven bipolar high voltage driver for capacitive loads
WALKER JAMES T3 citations61
US8963430B2Feb 24, 2015
Circuit for detection and control of LED string operation
WALKER JAMES T1 citations51
US8558598B2Oct 15, 2013
Phase shift generating circuit
WALKER JAMES T0 citations40