HP HOLDINGS THREE, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 7152
 
 
 
H04B TRANSMISSION 2208

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5995914 Method and apparatus for asynchronously measuring frequency shifted signalsJan 19, 96Nov 30, 99[G01R]
5818240 Method and system for measuring signal transfer characteristics in the presence of WOW, flutter and intermodulation distortionDec 12, 96Oct 06, 98[G01R]
5748001 Method and apparatus for fast response and distortion measurementDec 12, 96May 05, 98[G01R]
5749047 Method and apparatus for recognizing a test signal and determining signal transfer characteristics therefromApr 05, 95May 05, 98[G01R]
5649304 Method and apparatus for communicating auxiliary information in a measurement signalApr 07, 95Jul 15, 97[H04B]
5475315 Method and apparatus for fast response and distortion measurementJul 23, 93Dec 12, 95[H04B, G01R]
5420516 Method and apparatus for fast response and distortion measurementJul 23, 93May 30, 95[G01R]
5336989 AC mains test apparatus and methodSep 19, 91Aug 09, 94[G01R]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5265201 Master-slave processor human interface systemExpiredAug 24, 92Nov 23, 93[G06F]
5247458 Method and apparatus for testing a digital system for the occurrence of errorsExpiredSep 11, 90Sep 21, 93[G06F]
5136267 Tunable bandpass filter system and filtering methodExpiredDec 26, 90Aug 04, 92[H03H]
5089981 Hybrid form digital filterExpiredApr 24, 89Feb 18, 92[G06F]
4631522 Method and circuit for compensation of a multiplying digital-to-analog converterExpiredApr 12, 85Dec 23, 86[H03K]
4614914 Low-distortion transformer-coupled circuitExpiredApr 12, 85Sep 30, 86[H03F]
4563652 Dual-stage filter with feedbackExpiredApr 12, 85Jan 07, 86[H03F]

Top Inventors for This Owner

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