HEWLETT-PACKARD GMBH

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
A61B DIAGNOSIS; SURGERY; IDENTIFICATION 1239
 
  
 
G01J MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY 177
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6285196 Process for the electrical testing of the base material for the manufacture of printed circuit boardsSep 02, 99Sep 04, 01[G01R]
5846190 Method of and apparatus for recognizing falsified pulse oximetry measurementsOct 10, 96Dec 08, 98[A61B]
5822060 Method of detecting sample substances and fluorescence spectrometer using the methodJan 14, 97Oct 13, 98[G01J]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6326603 Charge balance type photodiode array comprising a compensation circuitExpiredSep 09, 99Dec 04, 01[H01J]
5058588 Oximeter and medical sensor thereforExpiredSep 19, 89Oct 22, 91[A61B]
4930892 Photodiode array spectrometerExpiredSep 23, 88Jun 05, 90[G01J]
4925273 Variable optical attenuatorExpiredApr 21, 87May 15, 90[G02B]
4905915 Method and apparatus for pulverizing particulate materialExpiredJan 27, 89Mar 06, 90[B02C]
4872080 Protective circuit for a semiconductor laserExpiredAug 06, 84Oct 03, 89[H02H]
4784962 Mixture of amino acid derivatives, process of producing the mixture and use of the mixture for quantitative determination of the amino acidsExpiredFeb 25, 87Nov 15, 88[G01N]
4754163 Pulse generator with adjustable pulse frequency, pulse width and pulse delayExpiredJun 29, 84Jun 28, 88[H03K, G05F]
4746184 Light coupler for optical reflectometryExpiredJul 09, 86May 24, 88[G01N, G02B]
4624625 High pressure metering pumpExpiredMar 14, 85Nov 25, 86[F04B]
4625105 Electro-optic circuit with source control feedbackExpiredMay 07, 84Nov 25, 86[G01J]
4613777 Binary signal comparator using two d flip-flops for precise triggeringExpiredDec 20, 84Sep 23, 86[H03K]
4598199 Safety device for controlling a light signal generator based on fiber positionExpiredNov 03, 83Jul 01, 86[G01V]
4528499 Modified bridge circuit for measurement purposesExpiredOct 07, 82Jul 09, 85[G01R]
4456833 Regulated power supplyExpiredNov 02, 82Jun 26, 84[H02J]
4412138 Pulse generator circuitExpiredDec 28, 81Oct 25, 83[H03K]
4403184 Autocorrelation apparatus and method for approximating the occurrence of a generally periodic but unknown signalExpiredMar 18, 82Sep 06, 83[A61B, G01R]
4400801 Read/write circuit for a random access memoryExpiredDec 04, 80Aug 23, 83[G11C]
4395642 Sine-shaping circuitExpiredDec 11, 80Jul 26, 83[H03K, G06G]
4374656 Apparatus for solvent degassing and solvent supply in liquid chromatographsExpiredJun 24, 81Feb 22, 83[B01D]

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