Inventor · disambiguated record
David E. Call
Also filed as: CALL DAVID · CALL DAVID E · CALL DAVID ERNEST
17 granted patents·387 citations·filing 1990–2024
94Inventor score
Files withIBM11HGST Netherlands BV1HITACHI GLOBAL STORAGE TECH1HITACHI GLOBAL STORAGE TECH NL1REPUBLIC SERVICES INTELLECTUAL PROPERTY HOLDINGS INC1
Top patents by PatentIndex Score
17 records- 0192US5216659ALaser power calibration by measuring laser drive current at out of focus and in focus conditionsIBM·Filed 1991·Granted Jun 1, 1993·67 cites·17 claims
- 0291US5268893AWrite power calibration utilizing least squares fit of read-back signals for moving media memoryIBM·Filed 1991·Granted Dec 7, 1993·66 cites·20 claims
- 0388US5309461ACompensated laser drive circuitIBM·Filed 1992·Granted May 3, 1994·47 cites·14 claims
- 0487US5640381ALaser power-drive circuit having a scaling DAC supplying a scaled reference signal to a plurality of scaled DAC's that supply a plurality of scaled output signalsIBM·Filed 1996·Granted Jun 17, 1997·54 cites·20 claims
- 0586US7564236B1Thermal fly height induced shield instability screening for magnetoresistive headsHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Jul 21, 2009·6 cites·20 claims
- 0683US5185734ACalibrating and power-protecting laser drive circuitsIBM·Filed 1990·Granted Feb 9, 1993·37 cites·7 claims
- 0782US8040131B2Method for testing the acceptability of a magnetic read sensorHITACHI GLOBAL STORAGE TECH NL·Filed 2008·Granted Oct 18, 2011·5 cites·20 claims
- 0881US5450383AMonitoring and adjusting laser write power in an optical disk recorder using pulse-width modulated power level checking signalsIBM·Filed 1995·Granted Sep 12, 1995·38 cites·15 claims
- 0969US5526329ACalibration of readback threshold in an optical storage device to determine a blank sectorIBM·Filed 1995·Granted Jun 11, 1996·19 cites·5 claims
- 1062US5172365ASystem for predicting laser end-of life from the power vs. current curve of the diodeIBM·Filed 1991·Granted Dec 15, 1992·23 cites·10 claims
- 1160US5383175ALaser power control with defocusing offset during data recordingIBM·Filed 1992·Granted Jan 17, 1995·12 cites·7 claims
- 1258US12377443B2Recovery of higher volume and higher quality recyclables from a mixed streamREPUBLIC SERVICES INTELLECTUAL PROPERTY HOLDINGS INC·Filed 2024·Granted Aug 5, 2025·0 cites·2 claims
- 1348US11998953B2Recovery of higher volume and higher quality recyclables from a mixed streamREPUBLIC SERVICES INTELLECTUAL PROPERTY HOLDINGS LLC·Filed 2022·Granted Jun 4, 2024·0 cites·20 claims
- 1446US10643669B2Parallel testing of magnetic recording slidersWESTERN DIGITAL TECH INC·Filed 2019·Granted May 5, 2020·0 cites·24 claims
- 1545US9454981B1Structures and methods for parallel testing of multiple read heads in two dimensional magnetic recording slidersHGST Netherlands BV·Filed 2015·Granted Sep 27, 2016·1 cites·27 claims
- 1645US5602806AMagneto-optical recording device capable of reducing thermal interference between recording pitsIBM·Filed 1995·Granted Feb 11, 1997·7 cites·25 claims
- 1745US5430702ACalibration of readback threshold in an optical storage deviceIBM·Filed 1994·Granted Jul 4, 1995·5 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →