SYCAMORE IP HOLDINGS LLC

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04J MULTIPLEX COMMUNICATION 9116
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 4201
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 4443
 
  
 
H01S DEVICES USING STIMULATED EMISSION488
 
  
 
H04B TRANSMISSION 4206
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 3282
 
  
 
G01J MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY 177
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
H04M TELEPHONIC COMMUNICATION 1162

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8018854 Facility and equipment testing for packet networksMay 03, 06Sep 13, 11[H04L, G06F, G01R, H04J]
7826345 Network span protection using span identifiersJul 07, 04Nov 02, 10[H04J]
7050561 Restoration scheme for mesh-based switching networksJul 19, 01May 23, 06[H04M]
6952405 Coding scheme using a transition indicator for signal transmission in optical communications networksFeb 27, 01Oct 04, 05[H04L]
6681248 Method for port connectivity discovery in transparent high bandwidth networksApr 12, 00Jan 20, 04[G06F]
6661963 System and method for calibrating and operating a semiconductor variable optical attenuatorJul 31, 01Dec 09, 03[G02B]
6614569 System and method for narrow channel spaced dense wavelength division multiplexing/demultiplexingFeb 12, 01Sep 02, 03[H04J]
6557101 Methods and apparatus for upgrading programmable control logic without disturbing network traffic flowing through functional elements controlled by the control logicDec 22, 99Apr 29, 03[G06F]
6553175 Variable optical attenuatorJan 17, 01Apr 22, 03[G02B]
6549312 Method for designing optical filter cardsMay 09, 01Apr 15, 03[G02B, H04J]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7012887 Method for restoring diversely routed circuitsExpiredMay 08, 01Mar 14, 06[H04L]
6961525 Method for channel balanceExpiredOct 23, 01Nov 01, 05[H04J]
6912606 Generic serial bus architectureExpiredJun 08, 01Jun 28, 05[G06F]
6862564 Network emulatorExpiredOct 26, 00Mar 01, 05[G06F]
6859468 Method and system for mode stabilization of VCSELS using increased bias currentExpiredMay 29, 01Feb 22, 05[H01S]
6847607 Automatic provisioning of protection circuits in a communications networkExpiredJun 01, 00Jan 25, 05[H04L]
6839866 System and method for the use of reset logic in high availability systemsExpiredMay 31, 01Jan 04, 05[G06F]
6839871 Method for transparent multiplexing of SONET/ SDH streamsExpiredFeb 08, 01Jan 04, 05[G06F]
6826372 Methods and apparatus for dynamic threshold setting for an optically amplified receiverExpiredAug 30, 00Nov 30, 04[H04B]
6823470 Method and apparatus for correcting dataExpiredFeb 09, 01Nov 23, 04[G06F]
6807001 Auto shutdown for distributed raman amplifiers on optical communication systemsExpiredApr 09, 02Oct 19, 04[H01S]
6754208 Traffic spreading to reduce blocking in a groomed CLOS communication switchExpiredAug 01, 01Jun 22, 04[H04Q]
6741761 Method for achieving improved transmission performance over fiber using a Mach-Zehnder modulatorExpiredJun 28, 01May 25, 04[G02F]
6738262 Port filler baffleExpiredMay 21, 01May 18, 04[H05K]
6735357 Monitoring and control of all-optical cross connect fabrics using multiple laser sourcesExpiredJun 15, 01May 11, 04[G02B]
6587630 Optical backplane cartridgeExpiredJun 01, 01Jul 01, 03[G02B]
6580531 Method and apparatus for in circuit biasing and testing of a modulated laser and optical receiver in a wavelength division multiplexing optical transceiver boardExpiredDec 30, 99Jun 17, 03[H04B]

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