Inventor · Santa Clara, CA, US

Robert L. Cloke

37Patents
30h-index
20Co-inventors
85Inventor score

Filing activity: May 27, 1975 → Sep 21, 2004

Most-cited inventions

PatentTitleAreaCited byStatus
US6278568A Disk drive employing read channel IC with common port for data and servo Physics 233 Expired
US6411452B1 Disk drive employing read error tolerant sync mark detection Physics 216 Expired
US6208477A Hard disk drive having a built-in self-test for measuring non-linear signal distortion Physics 183 Expired
US6178056A Disk drive employing state variable trap registers for providing stored servo and user data state variables to sampled-data channel Physics 175 Expired
US6262857A Disk drive including a recording surface employing servo zones with banded data zones Physics 169 Expired
US6441981B1 Disk drive including a recording surface employing servo zones recorded at a channel frequency different from data zones Physics 164 Expired
US7068459B1 Adjusting track density by changing PES algorithm when servo writing a disk drive from spiral tracks Physics 161 Expired
US6111717A Disk drive comprising a programmable preamplifier including a multiplexer for selecting between internal digital signals for output to a terminal Physics 160 Expired
US6600620B1 Self-servo writing a disk drive by propagating interleaved sets of timing clocks and servo bursts during alternate time intervals Physics 160 Expired
US6965489B1 Using an external spiral servo writer to write reference servo sectors and spiral tracks to a disk to facilitate writing product servo sectors to the disk Physics 159 Expired
US6487032B1 Computer system comprising a host connected to a disk drive employing state variable trap registers for providing stored servo and user data state variables to sampled-data channel Physics 157 Expired
US6710951B1 Phase locked loop employing a fractional frequency synthesizer as a variable oscillator Electricity 155 Expired
US6693760B1 Preamplifier circuit configurable to allow simultaneous read and write operations for self-servo writing a disk drive Physics 153 Expired
US6519104B1 Computer system comprising a host connected to a disk drive employing read channel IC with common port for data and servo Physics 152 Expired
US6292912A Disk drive having built-in self-test system for characterizing performance of the drive Physics 145 Expired
US6977789B1 Disk drive for circular self servo writing and spiral self servo writing using prewritten reference servo bursts Physics 141 Expired
US6246346A Storage system employing high-rate code with constraint on run length between occurrences of an influential pattern Electricity 136 Expired
US6924960B1 Timing compensation in a self-servowriting system Physics 135 Expired
US6989954B1 Demodulating servo sectors and spiral tracks using common circuitry Physics 133 Expired
US6191909A Polling a preamplifier within a disk drive to remotely determine pre-established parametric values Physics 132 Expired
US6992848B1 Using an external spiral servo writer to write spiral reference patterns to a disk to facilitate writing product servo bursts to the disk Physics 131 Expired
US7016134B1 Using an external spiral servo writer to write spiral tracks to a disk to facilitate writing product servo sectors to the disk Physics 123 Expired
US6992851B1 Method for nonsequentially writing reference spiral servo patterns to a disk to compensate for disk expansion Physics 119 Expired
US7046472B1 Method and apparatus for self servowriting of tracks of a disk drive using an observer based on an equivalent one-dimensional state model Physics 111 Expired
US6924961B1 Method and apparatus for self servowriting of tracks of a disk drive using an observer based on an equivalent one-dimensional state model Physics 111 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.