KONINKLIJKE PTT NEDERLAND N.V.
Patent Owner
Stats
- 11 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Jan 23, 2001 most recent publication
Details
- 11 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 469 Total Citation Count
- Apr 10, 1991 Earliest Filing
- 8 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
Rank in Class
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
Patent #
Title
Filing Date
Issue Date
Intl Class
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]
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]
Expired/Abandoned/Withdrawn Patents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]
5424861 Optical signal transmission with polarization-insensitive coherent detection and frequency stabilization at the receiving endExpiredApr 14, 93Jun 13, 95[H04B]
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