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Inventor

Fred Greenfeld

Inventor
Nederland, CO, US

Overview

12→
Patents
2003–2016
Patent span
Electricity
Primary field (CPC H)

Patents· 12 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H02Mprimary
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems36%
H05BElectric heating23%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications23%
H02HEmergency protective circuit arrangements5%
H02JElectric power networks5%
H03KPulse technique5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
PatentTitleYear
9,263,963'Current-responsive active rectification for a power supply operable in a discontinuous mode'20168,901,832'LED driver system with dimmer detection'20148,344,657'LED driver with open loop dimming control'20138,339,055'Inrush current limiter for an LED driver'20128,335,091'Asymmetric zero-voltage switching full-bridge power converters'20128,035,996'Asymmetric zero-voltage switching full-bridge power converters'20118,022,634'Method and system for dimming AC-powered light emitting diode (LED) lighting systems using conventional incandescent dimmers'20117,944,153'Constant current light emitting diode (LED) driver circuit and method'20117,876,067'High frequency connector-less charging scheme'20117,196,503'Current averaging circuit for a PWM power converter'20076,819,154'Constant deadtime control in a feed forward enabled pulse width modulator controller'20046,538,905'DC-to-DC power converter including at least two cascaded power conversion stages'2003

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2003Based in Broomfield, CO, US· patent location history
2004–2013Patents assigned to INTERSIL INC (8)· patent assignee history
2004Based in Melbourne Beach, FL, US· patent location history
2007Based in Satellite Beach, FL, US· patent location history
2011–2016Based in Nederland, CO, US· patent location history
2012–2013Patents assigned to GREENFELD FRED (2)· patent assignee history
2012–2014Patents assigned to GREENFELD FRED F (2)· patent assignee history
2012–2013Patents assigned to YU XIANGXU (2)· patent assignee history
2014–2016Patents assigned to Intersil Americas LLC (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
INTERSIL INC82004–2013
GREENFELD FREDself22012–2013
GREENFELD FRED Fself22012–2014
Intersil Americas LLC22014–2016
YU XIANGXU22012–2013
Locations
LocationPatentsSpan
Nederland, CO, US92011–2016
Satellite Beach, Florida, US12007
Melbourne Beach, Florida, US12004
Broomfield, CO, US12003