Inventor
SCHAEFER RALF
DE34 patents
⚠️ This page may combine multiple inventors who share the name “SCHAEFER RALF”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PHILIPS CORP
17 patentsUS4812736AMar 14, 1989
Circuit arrangement for operating high-pressure gas discharge lamps
PHILIPS CORP25 citations92
US4471269ASep 11, 1984
Circuit arrangement for operating a high-pressure gas discharge lamp
PHILIPS CORP43 citations92
US5736811AApr 7, 1998
Capped high-pressure discharge lamp
PHILIPS CORP24 citations91
US5742114AApr 21, 1998
Lamp envelope with a metal clamping member and a fixation member
PHILIPS CORP25 citations89
US4594531AJun 10, 1986
Circuit arrangement for operating high-pressure gas discharge lamps
PHILIPS CORP22 citations81
US4994716AFeb 19, 1991
Circuit arrangement for starting and operating gas discharge lamps
PHILIPS CORP7 citations73
US4539513ASep 3, 1985
Circuit arrangement for starting and operating a high-pressure gas discharge lamp
PHILIPS CORP11 citations73
US5113085AMay 12, 1992
Circuit arrangement for supplying a load
PHILIPS CORP14 citations72
US4714862ADec 22, 1987
Circuit arrangement for igniting and operating gas discharge lamps
PHILIPS CORP12 citations72
US5654608AAug 5, 1997
Capped electric lamp
PHILIPS CORP7 citations71
US4795943AJan 3, 1989
High-pressure sodium vapor discharge lamp
PHILIPS CORP10 citations70
US5025197AJun 18, 1991
Circuit arrangement for A.C. operation of high-pressure gas discharge lamps
PHILIPS CORP4 citations62
US4891563AJan 2, 1990
Circuit arrangement for adjusting the operating voltage of high-pressure gas discharge lamps
PHILIPS CORP6 citations62
US4839560AJun 13, 1989
Heatable electrode for high-pressure gas discharge lamps
PHILIPS CORP2 citations62
US4816721AMar 28, 1989
Circuit arrangement for operating a high-pressure gas discharge lamp
PHILIPS CORP5 citations62
US4748381AMay 31, 1988
Circuit arrangement for A.C. operation of gas discharge lamps
PHILIPS CORP4 citations62
US5039916AAug 13, 1991
Operating circuit for a high-pressure discharge lamp
PHILIPS CORP2 citations54
THOMSON LICENSING
5 patentsUS7971224B2Jun 28, 2011
Interactive television reception and transmitting processes and associated devices
THOMSON LICENSING3 citations62
US7895619B2Feb 22, 2011
Method for controlling display of audio-visual programmes, and receiver for displaying same
THOMSON LICENSING5 citations62
US7770187B2Aug 3, 2010
Applications manager with variable management instruction set
THOMSON LICENSING2 citations62
US7627762B2Dec 1, 2009
Signing and authentication devices and processes and corresponding products, notably for DVB/MPEG MHP digital streams
THOMSON LICENSING5 citations60
US7774800B2Aug 10, 2010
Applications manager with variable management instruction set
THOMSON LICENSING0 citations51
SCHAEFER RALF
4 patentsUS5117340AMay 26, 1992
Lighting device
SCHAEFER RALF14 citations72
US4644216AFeb 17, 1987
High-pressure discharge lamp
SCHAEFER RALF2 citations60
US9386344B2Jul 5, 2016
Method of transmitting digital services over a network and device implementing the method
SCHAEFER RALF0 citations40
US9192936B2Nov 24, 2015
Method and device for crushing and drying moisture-containing material, especially wood
SCHAEFER RALF0 citations40