WEST ELECTRIC CO., LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01J ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS 1127

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5709578 Process of making cold cathode fluorescent tubeNov 19, 96Jan 20, 98[H01J]
5672936 Cold cathode fluorescent discharge tubeJun 27, 94Sep 30, 97[K01J]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5504545 Illuminating apparatusExpiredOct 31, 94Apr 02, 96[G03B]
5280161 Apparatus for optically reading a bar codeExpiredDec 13, 91Jan 18, 94[G06K]
5262810 Film winding systemExpiredSep 17, 92Nov 16, 93[G03B]
5201302 Voltage regulator tube for ignition system of internal combustion engineExpiredMay 26, 92Apr 13, 93[F02P]
5072153 Discharge tube for ignition apparatusExpiredApr 13, 90Dec 10, 91[H01J]
D318477 Camera with an integral electronic flashExpiredMar 09, 89Jul 23, 91[]
4938588 Distance detecting apparatusExpiredSep 23, 88Jul 03, 90[G03B, G01C]
4899086 Electroluminescence light emission apparatusExpiredDec 28, 87Feb 06, 90[H05B]
4866341 Discharge lamp with base for sealing the lampExpiredJul 07, 87Sep 12, 89[H01J]
4847538 Electronic flash equipmentExpiredAug 19, 87Jul 11, 89[H04B]
4735494 Zoom lens control system and method for zooming controlExpiredMay 19, 86Apr 05, 88[H04N, G02B]
4702583 Drive device for lens barrel and diaphragm shutterExpiredDec 01, 86Oct 27, 87[G03B]
4697906 Electric flash deviceExpiredSep 26, 86Oct 06, 87[H05B, G03B]
4695144 Drive apparatus of lens and exposure mechanism by motorExpiredAug 25, 86Sep 22, 87[G03B]
4695893 Automatic focusing apparatusExpiredOct 04, 85Sep 22, 87[H04N, G03B]
4632530 Automatic film winding systemExpiredFeb 04, 81Dec 30, 86[G03B]
4603958 Automatic electronic flashExpiredNov 13, 84Aug 05, 86[G03B]
4596449 Zoom lens apparatusExpiredDec 13, 83Jun 24, 86[G02B]
4585313 Lens drive device and optical lens assembly utilizing the sameExpiredDec 13, 83Apr 29, 86[G02B]
4584477 Method for measuring distance and optical distance meterExpiredNov 28, 84Apr 22, 86[G01C]

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