KDD SUBMARINE CABLE SYSTEMS INC. (KDD-SCS)

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01S DEVICES USING STIMULATED EMISSION191
 
  
 
H04B TRANSMISSION 1209

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5162936 Apparatus for monitoring the operation of an optical repeaterFeb 14, 91Nov 10, 92[H04B]
5138621 Pumping light source drive system for an optical amplifierApr 04, 91Aug 11, 92[H01S]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5539557 Supervisory signal receiving method and apparatusExpiredNov 17, 94Jul 23, 96[H04B]
5471333 Optical communication systemExpiredSep 22, 93Nov 28, 95[H04B]
5317382 Optical phase detection method with orthogonal polarization and phase compensation arrangementExpiredNov 25, 91May 31, 94[G01B]
5140452 Long-distance high-speed optical communication schemeExpiredJan 02, 91Aug 18, 92[H04B]
5048922 Optical fiber cableExpiredJan 14, 88Sep 17, 91[G02B]
5042039 Er-doped optical fiber laser deviceExpiredDec 19, 89Aug 20, 91[H01S]
4972513 Multi-point optical amplification repeating systemExpiredJul 21, 88Nov 20, 90[H04B]
4933990 Optical privacy communication system in two-way optical transmission systemExpiredJul 21, 88Jun 12, 90[G02B]
4899043 Fault monitoring system for optical fiber communication systemsExpiredJul 15, 88Feb 06, 90[H01J]
4790655 System for measuring laser spectrumExpiredMay 05, 86Dec 13, 88[G01B]
4720162 Device for switching from one light source to anotherExpiredApr 11, 86Jan 19, 88[G02B]
4710976 Optical repeater monitoring systemExpiredMay 07, 85Dec 01, 87[H04B]
4708427 Optical submarine cable connectionExpiredMay 21, 85Nov 24, 87[G02B]
4653846 Optical fiber hermetic fixing structure of feedthrough for optical submarine repeaterExpiredMar 28, 84Mar 31, 87[G02B]
4572608 Optical de-polarizerExpiredFeb 10, 84Feb 25, 86[G02B]
4544233 Underwater optical fiber connectorExpiredNov 30, 82Oct 01, 85[G02B]
4505540 Spliced portion housing structure for optical fiber in optical submerged repeaterExpiredJan 18, 82Mar 19, 85[G02B]
4469401 Optical fiber unit for optical submarine cablesExpiredMay 17, 82Sep 04, 84[G02B]

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