CT D ETUDES ET DE DEV DE L ELE

Overview

About

CT D ETUDES ET DE DEV DE L ELE has a total of 21 patent applications. Its first patent ever was published in 1954. It filed its patents most often in France, Germany and United Kingdom. Its main competitors in its focus markets electrical machinery and energy, semiconductors and audio-visual technology are PHILIPS ELECTRICAL IND LTD, YIELD ENG SYSTEMS INC and TELEDYNE E2V UK LTD.

Patent filings in countries

#	Industry
#1	Electrical machinery and energy
#2	Semiconductors
#3	Audio-visual technology
#4	Basic communication technologies
#5	Chemical engineering
#6	Engines, pumps and turbines
#7	Machines

#	Technology
#1	Electric discharge tubes
#2	Semiconductor devices
#3	Special electric heating or lighting
#4	Loudspeakers and microphones
#5	Magnets and transformers
#6	Pulse technique
#7	Resistors
#8	Separation
#9	Energy from radioactive sources
#10	Unspecified technologies

Publication	Filing date	Title
US2892964A	1957-10-28	Ionic discharge devices
DE1034289B	1956-12-28	Process for the production of directional conductors, such as photoresist cells and dry rectifiers
GB794025A	1954-07-22	Improvements in or relating to unidirectionally conducting elements