Assignee
NEDERLAND PTT
NL·145 granted patents·3,986 citations·filing 1989–1998
Top patents by PatentIndex Score
145 records- 0189US5544266ATranscoding deviceNEDERLAND PTT·Filed 1994·Granted Aug 6, 1996·155 cites·30 claims
- 0286US5714741ADevice for transparent interaction between an IC card and a remote terminalNEDERLAND PTT·Filed 1996·Granted Feb 3, 1998·151 cites·21 claims
- 0381US5914799AOptical networkNEDERLAND PTT·Filed 1996·Granted Jun 22, 1999·109 cites·5 claims
- 0477US5457563AOptical mixing device having one photodetector for a heterodyne receiverNEDERLAND PTT·Filed 1993·Granted Oct 10, 1995·55 cites·4 claims
- 0577US5197715AMethod for pulling plug for installing a cable in a cable conduitNEDERLAND PTT·Filed 1992·Granted Mar 30, 1993·43 cites·12 claims
- 0676US5497368ARouting method for a hierarchical communications network, and a hierarchical communications network having improved routingNEDERLAND PTT·Filed 1994·Granted Mar 5, 1996·137 cites·21 claims
- 0776US5308041ADevice for installing a cable in a cable ductNEDERLAND PTT·Filed 1993·Granted May 3, 1994·38 cites·9 claims
- 0876US5211377AMethod and device for installing a cable in a cable ductNEDERLAND PTT·Filed 1991·Granted May 18, 1993·40 cites·11 claims
- 0975US5900957AOptical packet-switched transmission networkNEDERLAND PTT·Filed 1997·Granted May 4, 1999·45 cites·20 claims
- 1075US5295016APolarization insensitive amplification deviceNEDERLAND PTT·Filed 1992·Granted Mar 15, 1994·51 cites·15 claims
- 1173US5897103AMethod for installing cablesNEDERLAND PTT·Filed 1996·Granted Apr 27, 1999·35 cites·26 claims
- 1272US6129341ADevice for installing cablesNEDERLAND PTT·Filed 1998·Granted Oct 10, 2000·34 cites·14 claims
- 1372US5557318AMethod and apparatus for permitting a viewer to scan through a plurality of video signals provided by a transmitterNEDERLAND PTT·Filed 1995·Granted Sep 17, 1996·77 cites·28 claims
- 1472US5016959AElectro-optical component and method for making the sameNEDERLAND PTT·Filed 1989·Granted May 21, 1991·34 cites·17 claims
- 1571US5870479ADevice for processing data packetsNEDERLAND PTT·Filed 1994·Granted Feb 9, 1999·70 cites·16 claims
- 1671US5185828AOptical waveguide (te,tm) mode converterNEDERLAND PTT·Filed 1992·Granted Feb 9, 1993·36 cites·27 claims
- 1770US5596321ASystem comprising a first encoder for coding a first digital signal, a second encoder for coding a second digital signal and at least one decoder for decoding coded digital signals, and coder and decoder for use in the systemNEDERLAND PTT·Filed 1993·Granted Jan 21, 1997·31 cites·17 claims
- 1868US5293436AIntegrated optical device adjustable as a polarization splitter by means of a Mach-Zehnder interferometerNEDERLAND PTT·Filed 1992·Granted Mar 8, 1994·32 cites·7 claims
- 1966US5826175AActive tag having one diode for modulation and demodulationNEDERLAND PTT·Filed 1996·Granted Oct 20, 1998·47 cites·8 claims
- 2066US5479492ATelevoting method and systemNEDERLAND PTT·Filed 1993·Granted Dec 26, 1995·128 cites·10 claims
- 2165US5740374ASystem for transferring messages via different sub-networks by converting control codes into reference code compatible with a reference protocol and encapsulating the code with the messageNEDERLAND PTT·Filed 1995·Granted Apr 14, 1998·96 cites·6 claims
- 2265US5524156APolarization and wavelength independent optical power splitting circuitNEDERLAND PTT·Filed 1995·Granted Jun 4, 1996·30 cites·20 claims
- 2365US5474277APulling plug aided by drag forces of a fluid medium for a portion of which the plug has a leaking apertureNEDERLAND PTT·Filed 1994·Granted Dec 12, 1995·26 cites·6 claims
- 2465US5410307ASystem comprising at least one encoder for coding a digital signal and at least one decoder for decoding a coded digital signal, and encoder and decoder for use in the systemNEDERLAND PTT·Filed 1993·Granted Apr 25, 1995·26 cites·15 claims
- 2564US5639183AInstalling cable-ductsNEDERLAND PTT·Filed 1995·Granted Jun 17, 1997·34 cites·20 claims
- 2664US5473463AOptical hybridNEDERLAND PTT·Filed 1993·Granted Dec 5, 1995·34 cites·6 claims
- 2763US5856659AMethod of securely modifying data on a smart cardNEDERLAND PTT·Filed 1997·Granted Jan 5, 1999·53 cites·12 claims
- 2863US5418867AIntegrated optical device for manipulating the polarization of optical signalsNEDERLAND PTT·Filed 1994·Granted May 23, 1995·26 cites·9 claims
- 2963US5313455ATransmission system with recording of untransmitted packetsNEDERLAND PTT·Filed 1992·Granted May 17, 1994·50 cites·9 claims
- 3063US5285507AControllable polarisation transformerNEDERLAND PTT·Filed 1993·Granted Feb 8, 1994·28 cites·9 claims
- 3162US6042006AAuthentication system wherein definition signals of two devices are altered, communicated between the two devices, and comparedNEDERLAND PTT·Filed 1997·Granted Mar 28, 2000·130 cites·14 claims
- 3262US5708734APolarisation-independent optical deviceNEDERLAND PTT·Filed 1996·Granted Jan 13, 1998·30 cites·18 claims
- 3362US5696856AIntegrated optical polarisation splitterNEDERLAND PTT·Filed 1996·Granted Dec 9, 1997·25 cites·14 claims
- 3462US5056883AIntegrated optical polarization splitterNEDERLAND PTT·Filed 1991·Granted Oct 15, 1991·32 cites·4 claims
- 3560US5570217APositionally independent application of an OTDR technique based on correlation in a branched optical fibre network during operationNEDERLAND PTT·Filed 1994·Granted Oct 29, 1996·45 cites·10 claims
- 3660US5315425AOptical transmission network with frequency locking meansNEDERLAND PTT·Filed 1991·Granted May 24, 1994·34 cites·9 claims
- 3759US5574808AOptical switching deviceNEDERLAND PTT·Filed 1993·Granted Nov 12, 1996·23 cites·19 claims
- 3859US5473673ASystem for transmitting selection code signals to TV or radio stationsNEDERLAND PTT·Filed 1994·Granted Dec 5, 1995·32 cites·4 claims
- 3959US5375178AIntegrated optical polarization manipulating deviceNEDERLAND PTT·Filed 1994·Granted Dec 20, 1994·22 cites·4 claims
- 4058US5796950AMethod of detecting service interactions in intelligent networksNEDERLAND PTT·Filed 1995·Granted Aug 18, 1998·38 cites·3 claims
- 4158US5574929AProcessor circuit comprising a first processor, a memory and a peripheral circuit, and system comprising the processor circuit and a second processorNEDERLAND PTT·Filed 1994·Granted Nov 12, 1996·36 cites·11 claims
- 4257US6062472ASystem and method for increasing a value of an electronic payment card including performing a restore transaction in response to interruption of a value increase transactionNEDERLAND PTT·Filed 1997·Granted May 16, 2000·123 cites·8 claims
- 4357US5793765AMethod for selecting links in networksNEDERLAND PTT·Filed 1994·Granted Aug 11, 1998·50 cites·11 claims
- 4457US5341430ADevice for effecting a modification in a stream of transmission cellsNEDERLAND PTT·Filed 1993·Granted Aug 23, 1994·33 cites·5 claims
- 4556US5510787ASystem comprising at least one encoder for coding a digital signal and at least one decoder for decoding a digital signal, and encoder and decoder for use in the system according to the inventionNEDERLAND PTT·Filed 1993·Granted Apr 23, 1996·17 cites·10 claims
- 4656US5423068AMethod of managing, in a telecommunication network, user data of a user who may move from a base work area associated with a base exchange to another work area associated with another exchangeNEDERLAND PTT·Filed 1993·Granted Jun 6, 1995·58 cites·16 claims
- 4755US6064946ASignal quality determining device and methodNEDERLAND PTT·Filed 1996·Granted May 16, 2000·27 cites·24 claims
- 4855US5924576AMethod for sorting items of mail in order of deliveryNEDERLAND PTT·Filed 1997·Granted Jul 20, 1999·32 cites·19 claims
- 4955US5907832AMethod of debiting an electronic payment meansNEDERLAND PTT·Filed 1996·Granted May 25, 1999·79 cites·17 claims
- 5055US5680236AIntegrated optical wavelength demultiplexerNEDERLAND PTT·Filed 1995·Granted Oct 21, 1997·19 cites·3 claims
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