Assignee
ENERTEC
FR·44 granted patents·1 pending application·589 citations·filing 1978–2005
Top patents by PatentIndex Score
45 records- 0188US4359684AElectronic watt-hour meterENERTEC·Filed 1978·Granted Nov 16, 1982·37 cites·62 claims
- 0286US4310863AMagnetic tape recordersENERTEC·Filed 1979·Granted Jan 12, 1982·31 cites·9 claims
- 0384US4494068AMeasurement shunt with compensation for induced error voltagesENERTEC·Filed 1983·Granted Jan 15, 1985·41 cites·11 claims
- 0484US4251766AMethod and apparatus for determining the direction of a fault on a power transmission lineENERTEC·Filed 1978·Granted Feb 17, 1981·45 cites·40 claims
- 0572US4224869AParallel line printerENERTEC·Filed 1978·Granted Sep 30, 1980·15 cites·32 claims
- 0668US4626772AProcess and device for determining a parameter associated with a faulty electric conductor, using a composite monitoring signalENERTEC·Filed 1984·Granted Dec 2, 1986·32 cites·5 claims
- 0766US4763103AProcess and method for wide band transmission, particularly for data transmission over an electricity distribution networkENERTEC·Filed 1986·Granted Aug 9, 1988·46 cites·11 claims
- 0864US4709280AApparatus for varying the path of magnetic tape passing over a rotary tape headENERTEC·Filed 1985·Granted Nov 24, 1987·15 cites·13 claims
- 0963US6796813B1Data storage or recording device and process for hermetically connecting a data recording and storage cartridge and receptacleENERTEC·Filed 2000·Granted Sep 28, 2004·23 cites·38 claims
- 1062US4595988AElectronic meter for measuring active and reactive energies in a three-phase networkENERTEC·Filed 1983·Granted Jun 17, 1986·21 cites·10 claims
- 1161US4327390ACapacitive voltage transformers with electronic outputENERTEC·Filed 1980·Granted Apr 27, 1982·25 cites·11 claims
- 1260US4500973AElectronic devicesENERTEC·Filed 1982·Granted Feb 19, 1985·14 cites·19 claims
- 1358US4560922AMethod for determining the direction of the origin of a disturbance affecting an element of an electrical energy transfer networkENERTEC·Filed 1984·Granted Dec 24, 1985·17 cites·11 claims
- 1458US4242634AElectronic multiplying circuitsENERTEC·Filed 1979·Granted Dec 30, 1980·11 cites·11 claims
- 1557US4366474AIdentification of electric power network phases experiencing disturbancesENERTEC·Filed 1981·Granted Dec 28, 1982·14 cites·5 claims
- 1655US4568872AMethod of measuring the distance of a fault on a line taking account of distributed capacitancesENERTEC·Filed 1983·Granted Feb 4, 1986·16 cites·6 claims
- 1754US4737800AElectrical supply for a thermal printing headENERTEC·Filed 1986·Granted Apr 12, 1988·12 cites·14 claims
- 1854US4431146ATape entrainment device with a movable entrainment rollerENERTEC·Filed 1981·Granted Feb 14, 1984·8 cites·5 claims
- 1951US4325098ADetection of the position of a fault on an electric linkENERTEC·Filed 1979·Granted Apr 13, 1982·11 cites·8 claims
- 2048US4833414AMethod and apparatus for the identification of a faulty conductor in a multiple supply lineENERTEC·Filed 1986·Granted May 23, 1989·13 cites·12 claims
- 2148US4710828ATracking alignment for a rotating magnetic transducer headENERTEC·Filed 1985·Granted Dec 1, 1987·10 cites·15 claims
- 2248US4361766ARemotely-controllable relaysENERTEC·Filed 1980·Granted Nov 30, 1982·23 cites·10 claims
- 2346US4739279AMethod and a device for rapid adjustment of the phase of a clock signal in rapid phaseENERTEC·Filed 1986·Granted Apr 19, 1988·13 cites·8 claims
- 2444US4785168ADevice for detecting and localizing neutral particles, and application thereofENERTEC·Filed 1986·Granted Nov 15, 1988·9 cites·33 claims
- 2542US4329638ACapacitive voltage transformersENERTEC·Filed 1980·Granted May 11, 1982·15 cites·12 claims
- 2642US4232298ARemotely-controllable relays and filters thereforENERTEC·Filed 1978·Granted Nov 4, 1980·10 cites·21 claims
- 2738US4723113AVery high frequency harmonic generatorENERTEC·Filed 1986·Granted Feb 2, 1988·7 cites·10 claims
- 2838US4488690ACassette with controlled-speed elastic beltENERTEC·Filed 1983·Granted Dec 18, 1984·3 cites·8 claims
- 2938US4363041ADual capstan tape transport having controlled tape tensionENERTEC·Filed 1980·Granted Dec 7, 1982·4 cites·7 claims
- 3035US4571655AMagnetic cassette with floating and auxiliary tensioning rollersENERTEC·Filed 1982·Granted Feb 18, 1986·2 cites·7 claims
- 3134US4389683ASwitch-tuned filtersENERTEC·Filed 1980·Granted Jun 21, 1983·4 cites·11 claims
- 3234US2005213466A1Data recording cartridge of the anti-compromise kind and associated anti-compromise processingENERTEC·Filed 2005·Application pending·0 cites
- 3333US4624399AGripping drive for magnetic tapeENERTEC·Filed 1985·Granted Nov 25, 1986·2 cites·8 claims
- 3433US4409545AElectronic measuring device for a polyphase network, in particular for the measurement of powerENERTEC·Filed 1981·Granted Oct 11, 1983·4 cites·13 claims
- 3532US4378533AModulator for injecting signals into a polyphase power transmission systemENERTEC·Filed 1980·Granted Mar 29, 1983·4 cites·3 claims
- 3630US4797846ADigital resonant filterENERTEC·Filed 1985·Granted Jan 10, 1989·5 cites·10 claims
- 3730US4507624AVoltage-to-frequency convertersENERTEC·Filed 1983·Granted Mar 26, 1985·1 cites·2 claims
- 3830US4335336ADevice for controlling speedENERTEC·Filed 1980·Granted Jun 15, 1982·8 cites·13 claims
- 3929US4852026AMethod and apparatus for the evaluation of an angle over an extended rangeENERTEC·Filed 1986·Granted Jul 25, 1989·1 cites·8 claims
- 4026US4737872AHigh density electrical connector for use with rotating head magnetic recording apparatusENERTEC·Filed 1986·Granted Apr 12, 1988·1 cites·9 claims
- 4125US4796225AProgrammable dynamic shift register with variable shift controlENERTEC·Filed 1985·Granted Jan 3, 1989·5 cites·1 claims
- 4222US4327392AProtective apparatus for use with power linesENERTEC·Filed 1980·Granted Apr 27, 1982·2 cites·5 claims
- 4319US4868774ADigital waveform generator and associated methodENERTEC·Filed 1988·Granted Sep 19, 1989·6 cites·14 claims
- 4414US6091588AMagnetic tape recorder having a capacitive coupling device in the form of fixed and mobile rings or ring segmentsENERTEC·Filed 1998·Granted Jul 18, 2000·1 cites·22 claims
- 4512US4780908AMethod and apparatus for signal transmission regulation in differential protectionENERTEC·Filed 1986·Granted Oct 25, 1988·2 cites·8 claims
Join the waitlist — get patent alerts
Get an alert when ENERTEC files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →