IBM Corporation
527Patents
7Active
527Granted
47Portfolio score
Filing activity: Mar 30, 1971 → Dec 19, 2017 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4642618A | Tool failure detector | Performing Operations; Transporting | 1,006 | Expired |
| US5586264A | Video optimized media streamer with cache management | Physics | 504 | Expired |
| US4975690A | Method for concurrent data entry and manipulation in multiple applications | Physics | 487 | Expired |
| US3956615A | Transaction execution system with secure data storage and communications | Physics | 454 | Expired |
| US4866769A | Hardware assist for protecting PC software | Physics | 310 | Expired |
| US5610821A | Optimal and stable route planning system | Physics | 294 | Expired |
| US5594910A | Interactive computer network and method of operation | Emerging Cross-Sectional Technologies | 293 | Expired |
| US5786626A | Thin radio frequency transponder with leadframe antenna structure | Emerging Cross-Sectional Technologies | 290 | Expired |
| US5219788A | Bilayer metallization cap for photolithography | Emerging Cross-Sectional Technologies | 286 | Expired |
| US4793895A | In situ conductivity monitoring technique for chemical/mechanical planarization endpoint detection | Physics | 273 | Expired |
| US4615011A | Iterative method for establishing connections and resulting product | Physics | 258 | Expired |
| US5567300A | Electrochemical metal removal technique for planarization of surfaces | Chemistry; Metallurgy | 255 | Expired |
| US5734893A | Progressive content-based retrieval of image and video with adaptive and iterative refinement | Emerging Cross-Sectional Technologies | 252 | Expired |
| US5146566A | Input/output system for computer user interface using magnetic levitation | Physics | 248 | Expired |
| US4418425A | Encryption using destination addresses in a TDMA satellite communications network | Electricity | 247 | Expired |
| US6525731B1 | Dynamic view-dependent texture mapping | Physics | 244 | Expired |
| US5063500A | System for executing segments of application program concurrently/serially on different/same virtual machine | Physics | 240 | Expired |
| US5809471A | Retrieval of additional information not found in interactive TV or telephony signal by application using dynamically extracted vocabulary | Electricity | 221 | Expired |
| US3970992A | Transaction terminal with unlimited range of functions | Physics | 216 | Expired |
| US4722653A | Material handling for automated assembly facility | Emerging Cross-Sectional Technologies | 201 | Expired |
| US5001697A | Method to automatically vary displayed object size with variations in window size | Physics | 199 | Expired |
| US6618704B2 | System and method of teleconferencing with the deaf or hearing-impaired | Physics | 195 | Expired |
| US6239851A | Planar light source device having polarization separator formed of two sheets with mating triangular prisms and different indices of refraction | Physics | 186 | Expired |
| US5539741A | Audio conferenceing system | Electricity | 185 | Expired |
| US6366945B1 | Flexible dynamic partitioning of resources in a cluster computing environment | Physics | 178 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.