MIDDLEFIELD VENTURES, INC

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04J MULTIPLEX COMMUNICATION 2123
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 1204
 
  
 
G11B INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER 1137
 
  
 
G11C STATIC STORES 1150
 
  
 
H03M CODING, DECODING OR CODE CONVERSION, IN GENERAL 1110
 
  
 
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
6618342 Spatially-spectrally swept optical memories and addressing methodsOct 05, 99Sep 09, 03[G11B]
6594421 Dynamically reconfigurable composite grating filters for temporal waveform processingJan 26, 00Jul 15, 03[G02B, H04J]
6313771 Codes, methods, and apparatus for optical encoding and decodingNov 17, 99Nov 06, 01[H03M]
6292282 Time-wavelength multiple access optical communication systems and methodsJul 16, 99Sep 18, 01[H04B, H04J]
5276637 Swept-carrier frequency selective optical memory and methodMar 25, 92Jan 04, 94[G11C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7065298 Code-based optical networks, methods, and apparatusExpiredNov 17, 99Jun 20, 06[H04J]
7055058 Self-healing log-structured RAIDExpiredDec 09, 02May 30, 06[G06F]
7047358 High-performance log-structured RAIDExpiredDec 09, 02May 16, 06[G06F]
6819460 Apparatus and methods for routing of optical beams via time-domain spatial-spectral filteringExpiredSep 19, 00Nov 16, 04[G02B, G03H, H04J]
6778102 Communication system and apparatus with synchronous orthogonal codingExpiredJun 09, 00Aug 17, 04[H03M]
2002/0162,026 Apparatus and method for providing secure network communicationAbandonedFeb 06, 02Oct 31, 02[H04L]
6314220 Segmented complex fiber gratingsExpiredJul 22, 98Nov 06, 01[G02B, H04J]
6160656 Method and apparatus for optical correlation recognition by time-integrated nonlinear detectionExpiredAug 10, 98Dec 12, 00[G06K]
5812318 Apparatus and methods for routing of optical beams via time-domain spatial-spectral filteringExpiredJul 21, 97Sep 22, 98[G02B, G11C]
4670854 Optical cross-correlation and convolution apparatusExpiredSep 30, 85Jun 02, 87[G06G, G02F]

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