John T. O'Brien
34Patents
14h-index
28Co-inventors
81Inventor score
Filing activity: Nov 28, 1979 → Apr 2, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5410667A | Data record copy system for a disk drive array data storage subsystem | Emerging Cross-Sectional Technologies | 317 | Expired |
| US5247638A | Apparatus for compressing data in a dynamically mapped virtual data storage subsystem | Physics | 230 | Expired |
| US4929946A | Adaptive data compression apparatus including run length encoding for a tape drive system | Electricity | 184 | Expired |
| US4988998A | Data compression system for successively applying at least two data compression methods to an input data stream | Electricity | 165 | Expired |
| US6038639A | Data file storage management system for snapshot copy operations | Physics | 139 | Expired |
| US5893919A | Apparatus and method for storing data with selectable data protection using mirroring and selectable parity inhibition | Physics | 131 | Expired |
| US4300220A | Three component detector and housing for same | Emerging Cross-Sectional Technologies | 80 | Expired |
| US5379391A | Method and apparatus to access data records in a cache memory by multiple virtual addresses | Physics | 79 | Expired |
| US5121479A | Early start mode data transfer apparatus | Physics | 45 | Expired |
| US6260115A | Sequential detection and prestaging methods for a disk storage subsystem | Physics | 44 | Expired |
| US6141771A | Method and system for providing a trusted machine state | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4534020A | Apparatus and method for detecting seismic waves | Emerging Cross-Sectional Technologies | 17 | Expired |
| US6817751B2 | Apparatus and method for mixing a fluid dispersion disposed in a container having either a cylindrical or a square shape | Emerging Cross-Sectional Technologies | 15 | Expired |
| US9164689B2 | Data storage system and method of processing a data access request | Physics | 14 | Active |
| US4610309A | Downhole tool | Physics | 14 | Expired |
| US5396620A | Method for writing specific values last into data storage groups containing redundancy | Physics | 13 | Expired |
| US5171943A | Tubewave damper probe for seismic applications | Emerging Cross-Sectional Technologies | 12 | Expired |
| USD337885S | Combined key chain and coin holder | General | 9 | Expired |
| US7096341B1 | System and method for reference count regeneration | Physics | 9 | Expired |
| US4310039A | Wood splitter | Performing Operations; Transporting | 8 | Expired |
| US7325968B2 | Structure for holding either a cylindrical or square shaped container during a mixing operation | Emerging Cross-Sectional Technologies | 8 | Active |
| US7077560B2 | Structure for holding either a cylindrical or square shaped container during a mixing operation | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4561300A | Temperature logging while drilling | Physics | 6 | Expired |
| US7322334B1 | Apparatus and method for starting a chain saw | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US7130983B1 | System and method for reference count regeneration | Physics | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.