EMC Corporation
4,993Patents
3,520Active
4,993Granted
63Portfolio score
Filing activity: Mar 28, 1988 → Oct 31, 2019 · 1,452 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6826582B1 | Method and system for using file systems for content management | Emerging Cross-Sectional Technologies | 2,128 | Expired |
| US5544347A | Data storage system controlled remote data mirroring with respectively maintained data indices | Emerging Cross-Sectional Technologies | 1,366 | Expired |
| US6269431A | Virtual storage and block level direct access of secondary storage for recovery of backup data | Emerging Cross-Sectional Technologies | 1,345 | Expired |
| US6324581A | File server system using file system storage, data movers, and an exchange of meta data among data movers for file locking and direct access to shared file systems | Electricity | 1,316 | Expired |
| US6421711B1 | Virtual ports for data transferring of a data storage system | Electricity | 1,231 | Expired |
| US6487561B1 | Apparatus and methods for copying, backing up, and restoring data using a backup segment size larger than the storage block size | Emerging Cross-Sectional Technologies | 1,219 | Expired |
| US5901327A | Bundling of write data from channel commands in a command chain for transmission over a data link between data storage systems for remote data mirroring | Physics | 1,206 | Expired |
| US6275953A | Recovery from failure of a data processor in a network server | Physics | 1,091 | Expired |
| US5742792A | Remote data mirroring | Emerging Cross-Sectional Technologies | 1,034 | Expired |
| US6076148A | Mass storage subsystem and backup arrangement for digital data processing system which permits information to be backed up while host computer(s) continue(s) operating in connection with information stored on mass storage subsystem | Physics | 1,029 | Expired |
| US6161111A | System and method for performing file-handling operations in a digital data processing system using an operating system-independent file map | Emerging Cross-Sectional Technologies | 971 | Expired |
| US5875478A | Computer backup using a file system, network, disk, tape and remote archiving repository media system | Physics | 955 | Expired |
| US8751463B1 | Capacity forecasting for a deduplicating storage system | Emerging Cross-Sectional Technologies | 720 | Active |
| US5799200A | Power failure responsive apparatus and method having a shadow dram, a flash ROM, an auxiliary battery, and a controller | Physics | 700 | Expired |
| US8086585B1 | Access control to block storage devices for a shared disk based file system | Physics | 599 | Active |
| US5772585A | System and method for managing patient medical records | Emerging Cross-Sectional Technologies | 595 | Expired |
| US6353878B1 | Remote control of backup media in a secondary storage subsystem through access to a primary storage subsystem | Emerging Cross-Sectional Technologies | 587 | Expired |
| US8566546B1 | Techniques for enforcing capacity restrictions of an allocation policy | Physics | 539 | Active |
| US7873619B1 | Managing metadata | Physics | 527 | Active |
| US8850546B1 | Privacy-preserving user attribute release and session management | Electricity | 505 | Active |
| US9250823B1 | Online replacement of physical storage in a virtual storage system | Physics | 503 | Active |
| US5829046A | On-line tape backup using an integrated cached disk array | Physics | 499 | Expired |
| US5586291A | Disk controller with volatile and non-volatile cache memories | Physics | 486 | Expired |
| US8984602B1 | Protected resource access control utilizing credentials based on message authentication codes and hash chain values | Electricity | 485 | Active |
| US8990905B1 | Protected resource access control utilizing intermediate values of a hash chain | Electricity | 483 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.