MD

Mark E. Duffy

GE: 23 patents #1,101 of 36,430Top 4%
Overall (All Time): #185,353 of 4,157,543Top 5%
23
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
8633653 Lighting control system with improved efficiency Bruce Richard Roberts, Jeffrey Plaskon, Lazlo Balazs, Istvan Maros, Avi Shertok 2014-01-21
8405324 Hospital lighting with solid state emitters William Winder Beers 2013-03-26
6741013 Shrouded electric lamp having functionally distinguishable center supports James T. Dakin, Curtis E. Scott 2004-05-25
5879215 Crimp length gauge for ceramic metal halide electrodes Raymond A. Heindl 1999-03-09
5866982 Arctube for high pressure discharge lamp Curtis E. Scott, Charles D. Greskovich, George Eric Coxon 1999-02-02
5676579 Patterned optical interference coatings for electric lamps Thomas G. Parham, Frederick W. Dynys, Carl Gunter, John M. Davenport, Thomas Golz +4 more 1997-10-14
5675677 Lamp-to-light guide coupling arrangement for an electrodeless high intensity discharge lamp John M. Davenport, Richard L. Hansler, Kenneth S. King, William J. Cassarly, Thomas G. Parham +3 more 1997-10-07
5587626 Patterned optical interference coatings for only a portion of a high intensity lamp envelope Thomas G. Parham, Frederick W. Dynys, Carl Gunter, John M. Davenport, Thomas Golz +4 more 1996-12-24
5479102 Simulated load circuit for simulating the arc impedance of an electrodless discharge lamp Sayed-Amr El-Hamamsy, Michael M. Secen, Gerald E. Duffy 1995-12-26
5479072 Low mercury arc discharge lamp containing neodymium James T. Dakin, Tommie Edward Berry, Timothy D. Russell 1995-12-26
5440199 Base for electrodeless discharge lamp Raymond A. Heindl, Frederick Hetzel, David J. Marks, Lawrence T. Mazza, Curtis E. Scott +1 more 1995-08-08
5378965 Luminaire including an electrodeless discharge lamp as a light source James T. Dakin, Lawrence W. Speaker, Raymond A. Heindl 1995-01-03
5373216 Electrodeless arc tube with stabilized condensate location James T. Dakin 1994-12-13
5363015 Low mercury arc discharge lamp containing praseodymium James T. Dakin, Tommie Edward Berry, Timothy D. Russell 1994-11-08
5332970 Method for measuring the impedance of an electrodeless arc discharge lamp Sayed-Amr El-Hamamsy, Michael M. Secen, Gerald E. Duffy 1994-07-26
5306987 Acoustic resonance arc stabilization arrangement in a discharge lamp James T. Dakin 1994-04-26
5248918 Starting aid for an electrodeless high intensity discharge lamp James T. Dakin, Raymond A. Heindl 1993-09-28
5214357 Low-loss L-C drive circuit for an electrodeless high intensity discharge lamp James T. Dakin, Raymond A. Heindl, Victor A. Levand, Jr. 1993-05-25
5151633 Self-extinguishing gas probe starter for an electrodeless high intensity discharge lamp George A. Farrall, John P. Cocoma, James T. Dakin, Tommie Edward Berry 1992-09-29
5150015 Electrodeless high intensity discharge lamp having an intergral quartz outer jacket Raymond A. Heindl, James T. Dakin, Harald L. Witting, Richard C. Nagle, Lawrence T. Mazza 1992-09-22
5140227 Starting aid for an electrodeless high intensity discharge lamp James T. Dakin, Raymond A. Heindl 1992-08-18
5095249 Gas probe starter for an electrodeless high intensity discharge lamp Victor D. Roberts, James T. Dakin, Raymond A. Heindl 1992-03-10
4891554 Arc discharge lamp having improved performance Victor A. Levand, Jr. 1990-01-02