Assignee
VAISALA OY
FI·70 granted patents·2,379 citations·filing 1975–1997
Top patents by PatentIndex Score
70 records- 0196US4335613AApparatus for indicating the freezing of the surface of an asphalt road, paved runway, or the likeVAISALA OY·Filed 1980·Granted Jun 22, 1982·166 cites·9 claims
- 0295US5646729ASingle-channel gas concentration measurement method and apparatus using a short-resonator Fabry-Perot interferometerVAISALA OY·Filed 1995·Granted Jul 8, 1997·209 cites·14 claims
- 0395US5561523AElectrically tunable fabry-perot interferometer produced by surface micromechanical techniques for use in optical material analysisVAISALA OY·Filed 1995·Granted Oct 1, 1996·229 cites·17 claims
- 0492US4609966AAbsolute pressure transducerVAISALA OY·Filed 1985·Granted Sep 2, 1986·63 cites·13 claims
- 0592US4295091ACircuit for measuring low capacitancesVAISALA OY·Filed 1979·Granted Oct 13, 1981·59 cites·6 claims
- 0689US5010343AMethod and device in the antenna and receiving system of a radio theodoliteVAISALA OY·Filed 1989·Granted Apr 23, 1991·79 cites·4 claims
- 0788US5589689AInfrared detector with Fabry-Perot interferometerVAISALA OY·Filed 1995·Granted Dec 31, 1996·120 cites·20 claims
- 0888US5483414AElectrical impedance detector for measurement of physical quantities, in particular of temperatureVAISALA OY·Filed 1993·Granted Jan 9, 1996·65 cites·10 claims
- 0987US4164868ACapacitive humidity transducerVAISALA OY·Filed 1975·Granted Aug 21, 1979·42 cites·14 claims
- 1086US5827438AElectrically modulatable thermal radiant source with specific filamentVAISALA OY·Filed 1996·Granted Oct 27, 1998·77 cites·20 claims
- 1182US4628403ACapacitive detector for absolute pressureVAISALA OY·Filed 1985·Granted Dec 9, 1986·42 cites·8 claims
- 1281US4875134APressure sensor construction and method for its fabricationVAISALA OY·Filed 1989·Granted Oct 17, 1989·39 cites·8 claims
- 1380US5641911AMethod and apparatus for feedback-control of an asymmetric differential pressure transducerVAISALA OY·Filed 1994·Granted Jun 24, 1997·43 cites·15 claims
- 1480US4378168ADew point detection method and deviceVAISALA OY·Filed 1981·Granted Mar 29, 1983·44 cites·23 claims
- 1579US5801647AMethod and apparatus for measuring road surface conditionsVAISALA OY·Filed 1996·Granted Sep 1, 1998·95 cites·16 claims
- 1679US5679902ASurface-micromachined symmetrical differential pressure sensor with electrodes patterned into multiple conducting areasVAISALA OY·Filed 1996·Granted Oct 21, 1997·41 cites·19 claims
- 1779US4831492ACapacitor construction for use in pressure transducersVAISALA OY·Filed 1988·Granted May 16, 1989·37 cites·3 claims
- 1876US4594639ACapacitive pressure detectorVAISALA OY·Filed 1985·Granted Jun 10, 1986·33 cites·6 claims
- 1975US5880836AApparatus and method for measuring visibility and present weatherVAISALA OY·Filed 1996·Granted Mar 9, 1999·46 cites·20 claims
- 2074US5531128ACapacitive transducer feedback-controlled by means of electrostatic force and method for controlling the profile of the transducing element in the transducerVAISALA OY·Filed 1994·Granted Jul 2, 1996·31 cites·20 claims
- 2174USD314155SHumidity and temperature meterVAISALA OY·Filed 1988·Granted Jan 29, 1991·18 cites·1 claims
- 2273US4500940ACapacitive humidity sensor and method for the manufacture of sameVAISALA OY·Filed 1983·Granted Feb 19, 1985·28 cites·6 claims
- 2373US4229776ACapacitive capsule for aneroid pressure gaugeVAISALA OY·Filed 1978·Granted Oct 21, 1980·24 cites·5 claims
- 2471US4924064AMethod for trimming a planar capacitorVAISALA OY·Filed 1988·Granted May 8, 1990·22 cites·3 claims
- 2570US5835216AMethod of controlling a short-etalon fabry-perot interferometer used in an NDIR mearsurement apparatusVAISALA OY·Filed 1996·Granted Nov 10, 1998·42 cites·20 claims
- 2670US5644080AMethod of measuring dewpoint or gas concentration and apparatus for prediction of icingVAISALA OY·Filed 1995·Granted Jul 1, 1997·37 cites·3 claims
- 2768US5075816ACapacitive humidity sensor construction and method for manufacturing the sensorVAISALA OY·Filed 1990·Granted Dec 24, 1991·31 cites·8 claims
- 2863US5033284ACalibration method for gas or vapor relative concentration sensorVAISALA OY·Filed 1989·Granted Jul 23, 1991·25 cites·4 claims
- 2962US5619144ADetector and method for observation of the presence of a liquid and/or of a change of phase in sameVAISALA OY·Filed 1994·Granted Apr 8, 1997·25 cites·14 claims
- 3062US4751654AMethod of and arrangement for measuring impedances in measuring circuits having programmed memoryVAISALA OY·Filed 1985·Granted Jun 14, 1988·20 cites·9 claims
- 3160US4928530APressure transducerVAISALA OY·Filed 1988·Granted May 29, 1990·19 cites·6 claims
- 3260US4589054ACapacitive pressure detector independent of temperatureVAISALA OY·Filed 1985·Granted May 13, 1986·18 cites·7 claims
- 3359US5625139AMethod of measuring concentration of nonpolar gases such as carbon dioxide by means of a polymer-based sensor and concentration sensor structureVAISALA OY·Filed 1995·Granted Apr 29, 1997·22 cites·8 claims
- 3459US5511417AMethod and arrangement in measurement of humidity, in particular in radiosondesVAISALA OY·Filed 1994·Granted Apr 30, 1996·22 cites·11 claims
- 3559US5485747AMethod of measurement of relative humidity, in particular in radiosondes, and humidity detectors that make use of the methodVAISALA OY·Filed 1994·Granted Jan 23, 1996·19 cites·8 claims
- 3659US5369278ACalibration method for gas concentration measurementsVAISALA OY·Filed 1993·Granted Nov 29, 1994·21 cites·5 claims
- 3759US4745803AMethod and apparatus for determining the covering on a road surfaceVAISALA OY·Filed 1986·Granted May 24, 1988·19 cites·10 claims
- 3858US5750903AMethod of linearizing a flow velocity sensor, a linearized flow velocity measurement apparatus and systemVAISALA OY·Filed 1995·Granted May 12, 1998·24 cites·17 claims
- 3956US5053784AApparatus and method for measuring the azimuth and elevation of an objectVAISALA OY·Filed 1990·Granted Oct 1, 1991·27 cites·6 claims
- 4056US4991424AIntegrated heatable sensorVAISALA OY·Filed 1989·Granted Feb 12, 1991·16 cites·16 claims
- 4155US4862317ACapacitive pressure transducerVAISALA OY·Filed 1988·Granted Aug 29, 1989·15 cites·5 claims
- 4255US4597027ACapacitive pressure detector structure and method for manufacturing sameVAISALA OY·Filed 1985·Granted Jun 24, 1986·14 cites·8 claims
- 4353US5511418AMethod for measurement of relative humidity, in particular in radiosondes, and humidity detectors that make use of the methodVAISALA OY·Filed 1995·Granted Apr 30, 1996·18 cites·13 claims
- 4453US4295090AElectronic selector switch particularly for use in radioscondesVAISALA OY·Filed 1979·Granted Oct 13, 1981·10 cites·7 claims
- 4552US5504577AMethod and apparatus for measuring meteorological visibility and scattering of light, said apparatus utilizing common optics for transmission and receptionVAISALA OY·Filed 1995·Granted Apr 2, 1996·20 cites·21 claims
- 4652US5335689AFastening arrangement between the closing piece or valve piece of a sonde balloon and the neck of the sonde balloonVAISALA OY·Filed 1993·Granted Aug 9, 1994·17 cites·7 claims
- 4752US5116124AMeasurement system for scattering of lightVAISALA OY·Filed 1991·Granted May 26, 1992·22 cites·8 claims
- 4851US4775830AMethod of and arrangement for measuring low capacitancesVAISALA OY·Filed 1986·Granted Oct 4, 1988·13 cites·24 claims
- 4949US5156045AMethod related to impedance detectors in radiosondesVAISALA OY·Filed 1991·Granted Oct 20, 1992·13 cites·11 claims
- 5046US4794266AMethod and apparatus for light transmission measurement by sending light, measuring received light and computing transmittanceVAISALA OY·Filed 1987·Granted Dec 27, 1988·11 cites·8 claims
Showing the top 50 of 70 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when VAISALA OY 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 →