KONINKLIJKE PTT NEDERLAND N.V.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION 3282
 
  
 
G06K RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS 2196
 
  
 
F26B DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM 129
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 1204
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 1446
 
  
 
G09G ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION 1150
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 1361
 
  
 
H04J MULTIPLEX COMMUNICATION 1124
 
  
 
H04K SECRET COMMUNICATION; JAMMING OF COMMUNICATION157
 
  
 
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
6176022 Removing moisture from hollow guiding members such as cable ductsMay 10, 00Jan 23, 01[F26B]
6119945 Method and system for storing tickets on smart cardsAug 08, 97Sep 19, 00[G06K]
5960365 Simultaneous registration in multiple overlapping domainsSep 30, 97Sep 28, 99[H04Q]
5914471 Method and apparatus for recording usage data of card operated devicesAug 27, 96Jun 22, 99[G06K]
5809147 Device for cryptographically processing data packets and method of generating cryptographic processing dataAug 14, 97Sep 15, 98[H04L, H04K]
5784379 Clock recovery for ATM receiverSep 07, 95Jul 21, 98[H04L]
5691744 Processor system comprising a processor and a memory field for containing a computer interfaceApr 18, 96Nov 25, 97[G09G]
5623668 Method in a polling system for transmitting queue elements from multiple input queues to a single output with improved queue service performanceNov 21, 95Apr 22, 97[G06F]
5291544 Method of transferring, between two switching exchanges for mobile services, the handling of an active connection with a mobile terminalJun 17, 92Mar 01, 94[H04M]
5224092 Method for controlling a flow of data cells into a plurality of asynchronously time-divided transmission channels with a single admission switch for transmission in the channels with reference to the state of a plurality of count valuesJul 15, 91Jun 29, 93[H04L, H04J]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6115414 System for setting up a wireless connection for exchanging information with another system, which system is provided with a transceiver device for transmitting and receiving information in a wireless manner, and also modulator/demodulator deviceExpiredOct 23, 97Sep 05, 00[H04B]
5870400 Methods and apparatus for exchanging messages between systems having partially incompatible communicationExpiredApr 22, 97Feb 09, 99[H04J]
5774655 Method and apparatus for displaying multiple representations of connections in a communications network with differing levels of detailExpiredMay 07, 97Jun 30, 98[H04J]
5691916 Method and device for calculating the quality of transmission media containing codecsExpiredApr 14, 95Nov 25, 97[G06F]
5539802 System for testing the billing function in a telecommunication systemExpiredDec 20, 93Jul 23, 96[H04M]
5473884 Combined heat and power apparatusExpiredAug 11, 94Dec 12, 95[F22B]
5424861 Optical signal transmission with polarization-insensitive coherent detection and frequency stabilization at the receiving endExpiredApr 14, 93Jun 13, 95[H04B]
5295016 Polarization insensitive amplification deviceExpiredMay 29, 92Mar 15, 94[G02B, H01S]

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