D2B Systems Company Limited

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 1119
 
  
 
H03J TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS 19
 
  
 
H04B TRANSMISSION 1209
 
  
 
H04H BROADCAST COMMUNICATION 154
 
  
 
H04J MULTIPLEX COMMUNICATION 1124
 
  
 
H04N PICTORIAL COMMUNICATION, e.g. TELEVISION 1241

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5617330 Local communication system and station for use in such a systemDec 09, 94Apr 01, 97[G01R]
5602849 Communication bus system and station for use in such systemApr 17, 95Feb 11, 97[H04J]
5574965 Local communication bus system and apparatuses for use in such a systemOct 05, 92Nov 12, 96[H04H]
5479385 Apparatus interconnected for the communication of control messagesAug 04, 93Dec 26, 95[H02J, H04B, H03J]
5253060 Video signal processing system with networked control of aspect ratio conversion within the systemDec 10, 91Oct 12, 93[H04N]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6072442 Local communication system and station for use in such a systemExpiredJul 16, 97Jun 06, 00[G09G]
5929931 Local communication system and station for use in such a systemExpiredDec 09, 94Jul 27, 99[H04N]
5864658 Test apparatus for verifying the conformity of a device under test with a standard application protocolExpiredOct 08, 91Jan 26, 99[G06F]
5815082 Local communication bus system and apparatuses for use in such a systemExpiredMar 18, 92Sep 29, 98[H04Q]
5712852 D2B device station address initialization starting with stored addressExpiredJan 25, 95Jan 27, 98[G06F]
5680146 Local communication system and station for use in such a systemExpiredDec 09, 94Oct 21, 97[G09G]
5675571 D2B divice address initialization by use of default addressExpiredMar 13, 95Oct 07, 97[H04L]
5659373 Apparatuses interconnected for the communication of control messagesExpiredJun 07, 95Aug 19, 97[H04N]
5502436 Method of identifying a signal path and signal processing apparatusExpiredOct 11, 94Mar 26, 96[H04Q]
5499018 Local communication bus system and apparatus for use in such a systemExpiredMay 22, 95Mar 12, 96[H04Q]
5491805 Apparatus for automatically identifying point-to-point cable interconnections among a plurality of components which are also linked via a broadcast control channelExpiredDec 20, 94Feb 13, 96[G06F]
5485459 Local communication system with plural data channelsExpiredDec 15, 93Jan 16, 96[H04J]
5473606 Communication bus system with mitigation of slave station locking problem and master station for use in such communication bus systemExpiredJul 14, 94Dec 05, 95[H04L]

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