Western Digital
🏢 View company profile →235Patents
1Active
235Granted
45Portfolio score
Filing activity: Oct 8, 1975 → Jul 15, 2015
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6081447A | Wear leveling techniques for flash EEPROM systems | Physics | 374 | Expired |
| US6850443B2 | Wear leveling techniques for flash EEPROM systems | Physics | 331 | Expired |
| US5069626A | Plated plastic castellated interconnect for electrical components | Emerging Cross-Sectional Technologies | 302 | Expired |
| US6594183B1 | Wear leveling techniques for flash EEPROM systems | Physics | 290 | Expired |
| US6715044B2 | Device and method for controlling solid-state memory system | Emerging Cross-Sectional Technologies | 250 | Expired |
| US6278568A | Disk drive employing read channel IC with common port for data and servo | Physics | 233 | Expired |
| US6223303A | Disk drive having two tiered defect list comprising marginal and reserved data sectors | Physics | 224 | Expired |
| US6760196B1 | Microactuator with offsetting hinges and method for high-resolution positioning of magnetic read/write head | Physics | 222 | Expired |
| US6092149A | Disk drive cache system using a dynamic priority sequential stream of data segments continuously adapted according to prefetched sequential random, and repeating types of accesses | Physics | 198 | Expired |
| US4922141A | Phase-locked loop delay line | Electricity | 198 | Expired |
| US6091564A | Disk drive with calibration bursts that are recorded on a spiral and method of recording the same | Physics | 194 | Expired |
| US6208477A | Hard disk drive having a built-in self-test for measuring non-linear signal distortion | Physics | 183 | Expired |
| US6724572B1 | Inductive transducer with recessed leading pole layer | Physics | 183 | Expired |
| US6141175A | Repeatable runout cancellation in sectored servo disk drive positioning system | Physics | 176 | 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 |
| US6859343B1 | Hybrid diffuser for minimizing thermal pole tip protrusion and reader sensor temperature | Physics | 173 | Expired |
| US6262857A | Disk drive including a recording surface employing servo zones with banded data zones | Physics | 169 | Expired |
| US6249393A | Disk drive having a write condition detector for suspending write operations while a transducer flying height deviates from its operating flying height | Physics | 169 | Expired |
| US6271604A | Integrated computer module having a data integrity latch | Physics | 165 | Expired |
| US6145052A | Disk drive with adaptive pooling for command reordering | Physics | 164 | Expired |
| US6067206A | Method and apparatus to compensate for servo wedge rotational offset after a head switch | Physics | 162 | Expired |
| US6757140B1 | Electrostatic microelectromechanical (MEM) microactuator for precise read/write head positioning | Physics | 162 | Expired |
| US6105104A | Method and apparatus for optimizing the data transfer rate to and from a plurality of disk surfaces | Physics | 162 | Expired |
| US6205494A | Controller with automatic generation of linked list of data transfer descriptors for sequential commands, with linked list being used for execution of sequential data transfers | Physics | 161 | Expired |
| US6018789A | Disk drive with cache segment providing adaptively managed chunks | Physics | 160 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.