David E. Call
17Patents
8h-index
26Co-inventors
72Inventor score
Filing activity: Jul 20, 1990 → May 2, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5216659A | Laser power calibration by measuring laser drive current at out of focus and in focus conditions | Physics | 42 | Expired |
| US5268893A | Write power calibration utilizing least squares fit of read-back signals for moving media memory | Physics | 35 | Expired |
| US5309461A | Compensated laser drive circuit | Electricity | 28 | Expired |
| US5450383A | Monitoring and adjusting laser write power in an optical disk recorder using pulse-width modulated power level checking signals | Physics | 27 | Expired |
| US5640381A | Laser 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 signals | Physics | 26 | Expired |
| US5185734A | Calibrating and power-protecting laser drive circuits | Electricity | 25 | Expired |
| US5526329A | Calibration of readback threshold in an optical storage device to determine a blank sector | Physics | 15 | Expired |
| US5172365A | System for predicting laser end-of life from the power vs. current curve of the diode | Electricity | 8 | Expired |
| US5383175A | Laser power control with defocusing offset during data recording | Physics | 6 | Expired |
| US7564236B1 | Thermal fly height induced shield instability screening for magnetoresistive heads | Physics | 5 | Active |
| US5602806A | Magneto-optical recording device capable of reducing thermal interference between recording pits | Physics | 4 | Expired |
| US8040131B2 | Method for testing the acceptability of a magnetic read sensor | Physics | 4 | Active |
| US5430702A | Calibration of readback threshold in an optical storage device | Physics | 3 | Expired |
| US9454981B1 | Structures and methods for parallel testing of multiple read heads in two dimensional magnetic recording sliders | Physics | 1 | Active |
| US10643669B2 | Parallel testing of magnetic recording sliders | Physics | 0 | Active |
| US11998953B2 | Recovery of higher volume and higher quality recyclables from a mixed stream | Emerging Cross-Sectional Technologies | 0 | Active |
| US12377443B2 | Recovery of higher volume and higher quality recyclables from a mixed stream | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.