NEC MICROWAVE TUBE, 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 2126
 
  
 
C25F PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR 117

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5972180 Apparatus for electropolishing of helix used for a microwave tubeJan 12, 98Oct 26, 99[C25F]
5426351 Heater coil for electron tubeAug 09, 94Jun 20, 95[H01J]
5281895 Tuning mechanism for high power klystron having photointerrupter control meansSep 30, 91Jan 25, 94[H01J]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2007/0159,106 COLLECTOR IN MICROWAVE TUBEAbandonedJan 05, 07Jul 12, 07[H01J]
2006/0097,669 Electron tubeAbandonedOct 31, 05May 11, 06[H05H]
7034463 Traveling-wave tube having heat radiating structure with high thermal conductivityExpiredSep 10, 04Apr 25, 06[H01J]
6414421 Field emission cold cathodeExpiredNov 02, 99Jul 02, 02[H01J]
6377601 Ion laser apparatus and mirror angle adjusting method thereforExpiredFeb 03, 00Apr 23, 02[H01S]
6058130 Laser apparatus for generating different wavelength regionsExpiredJan 23, 98May 02, 00[H01S]
5990600 Emissive heat radiator with semi-cylindrical heat radiating memberExpiredSep 19, 97Nov 23, 99[H01J]
5965972 Field emission cold cathode with buried insulator layerExpiredMay 28, 97Oct 12, 99[H01J]
5946332 Laser having a connection detector for monitoring a connection between separated oscillator and power unitsExpiredSep 25, 97Aug 31, 99[H01S]
5930281 Ion laser apparatusExpiredJul 30, 97Jul 27, 99[H01S]
5904287 Method of bonding graphite to metalExpiredJul 29, 94May 18, 99[B23K]
5680011 Cold cathode density-modulated type electron gun and microwave tube using the sameExpiredJun 08, 94Oct 21, 97[H01J]
5651898 Field emission cold cathode and method for manufacturing the sameExpiredNov 21, 95Jul 29, 97[H01J]
5650688 Field emission cold cathode element having exposed substrateExpiredJun 02, 95Jul 22, 97[H01J]
5648698 Field emission cold cathode element having exposed substrateExpiredJun 02, 95Jul 15, 97[H01J]
5635789 Cold cathodeExpiredDec 30, 94Jun 03, 97[H01J]
5604401 Field-emission cold cathode for dual-mode operation useable in a microwave tubeExpiredDec 22, 94Feb 18, 97[H01J]
5585689 Field-emission cathode having integrated electrical interconnects and electron tube using the sameExpiredFeb 23, 96Dec 17, 96[H01J]
5559390 Field emission cold cathode element with locally thickened gate electrode layerExpiredApr 12, 94Sep 24, 96[H01J]
5514847 Electron beam radiator with cold cathode integral with focusing grid member and process of fabrication thereofExpiredJan 24, 94May 07, 96[H01J, B23K]

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