Inventor

Mark E. Duffy

Inventor

Shaker Heights, OH, US

Overview

23→

Patents

1990–2014

Patent span

Electricity

Primary field (CPC H)

Patents· 23 as inventor

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

H01Jprimary

H01JElectric discharge tubes or discharge lamps48%

H05BElectric heating21%

Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications9%

G01RMeasuring electric variables6%

F21WIndexing scheme associated with subclasses f21k, f21l, f21s and f21v, relating to uses or applications of lighting devices or systems3%

F21YIndexing scheme associated with subclasses f21k, f21l, f21s and f21v, relating to the form or the kind of the light sources or of the colour of the light emitted3%

G02BOptical elements, systems or apparatus3%

H01RElectrically-conductive connections3%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%

PatentTitleYear

8,633,653'Lighting control system with improved efficiency'2014 8,405,324'Hospital lighting with solid state emitters'2013 6,741,013'Shrouded electric lamp having functionally distinguishable center supports'2004 5,879,215'Crimp length gauge for ceramic metal halide electrodes'1999 5,866,982'Arctube for high pressure discharge lamp'1999 5,676,579'Patterned optical interference coatings for electric lamps'1997 5,675,677'Lamp-to-light guide coupling arrangement for an electrodeless high intensity discharge lamp'1997 5,587,626'Patterned optical interference coatings for only a portion of a high intensity lamp envelope'1996 5,479,072'Low mercury arc discharge lamp containing neodymium'1995 5,479,102'Simulated load circuit for simulating the arc impedance of an electrodless discharge lamp'1995 5,440,199'Base for electrodeless discharge lamp'1995 5,378,965'Luminaire including an electrodeless discharge lamp as a light source'1995 5,373,216'Electrodeless arc tube with stabilized condensate location'1994 5,363,015'Low mercury arc discharge lamp containing praseodymium'1994 5,332,970'Method for measuring the impedance of an electrodeless arc discharge lamp'1994 5,306,987'Acoustic resonance arc stabilization arrangement in a discharge lamp'1994 5,248,918'Starting aid for an electrodeless high intensity discharge lamp'1993 5,214,357'Low-loss L-C drive circuit for an electrodeless high intensity discharge lamp'1993 5,151,633'Self-extinguishing gas probe starter for an electrodeless high intensity discharge lamp'1992 5,150,015'Electrodeless high intensity discharge lamp having an intergral quartz outer jacket'1992 5,140,227'Starting aid for an electrodeless high intensity discharge lamp'1992 5,095,249'Gas probe starter for an electrodeless high intensity discharge lamp'1992 4,891,554'Arc discharge lamp having improved performance'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–2014Patents assigned to GEN ELECTRIC (23)· patent assignee history

1990–2014Based in Shaker Heights, OH, US· patent location history

2013Patents assigned to BEERS WILLIAM WINDER (1)· patent assignee history

2013Patents assigned to DUFFY MARK ELTON (1)· patent assignee history

2014Patents assigned to BALAZS LAZLO (1)· patent assignee history

2014Patents assigned to DUFFY MARK (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
GEN ELECTRIC	23	1990–2014
BALAZS LAZLO	1	2014
BEERS WILLIAM WINDER	1	2013
DUFFY MARKself	1	2014
DUFFY MARK ELTONself	1	2013

Locations

Location	Patents	Span
Shaker Heights, OH, US	23	1990–2014