Amdahl Corporation
171Patents
0Active
171Granted
41Portfolio score
Filing activity: Oct 17, 1973 → Dec 9, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4875159A | Version management system using plural control fields for synchronizing two versions of files in a multiprocessor system | Emerging Cross-Sectional Technologies | 310 | Expired |
| US4993030A | File system for a plurality of storage classes | Emerging Cross-Sectional Technologies | 178 | Expired |
| US5594899A | Operating system and data base having an access structure formed by a plurality of tables | Emerging Cross-Sectional Technologies | 138 | Expired |
| US5574936A | Access control mechanism controlling access to and logical purging of access register translation lookaside buffer (ALB) in a computer system | Physics | 130 | Expired |
| US5596752A | System for creating, editing, displaying, and executing rules-based programming language rules having action part subsets for both true and false evaluation of the conditional part | Emerging Cross-Sectional Technologies | 123 | Expired |
| US5089880A | Pressurized interconnection system for semiconductor chips | Electricity | 116 | Expired |
| US6145066A | Computer system with transparent data migration between storage volumes | Physics | 109 | Expired |
| US4682281A | Data storage unit employing translation lookaside buffer pointer | Physics | 104 | Expired |
| US5586330A | Programmable computer with automatic translation between source and object code | Emerging Cross-Sectional Technologies | 95 | Expired |
| US4841355A | Three-dimensional microelectronic package for semiconductor chips | Electricity | 91 | Expired |
| US5423025A | Error handling mechanism for a controller having a plurality of servers | Physics | 85 | Expired |
| US5682535A | Operating system and data base using table access method with dynamic binding | Physics | 83 | Expired |
| US5426783A | System for processing eight bytes or less by the move, pack and unpack instruction of the ESA/390 instruction set | Physics | 81 | Expired |
| US4395438A | Low pressure chemical vapor deposition of silicon nitride films | Emerging Cross-Sectional Technologies | 80 | Expired |
| US6453344B1 | Multiprocessor servers with controlled numbered of CPUs | Physics | 77 | Expired |
| US5586329A | Programmable computer with automatic translation between source and object code with version control | Emerging Cross-Sectional Technologies | 74 | Expired |
| US5175849A | Capturing data of a database system | Emerging Cross-Sectional Technologies | 71 | Expired |
| US5517668A | Distributed protocol framework | Physics | 70 | Expired |
| US4654790A | Translation of virtual and real addresses to system addresses | Physics | 68 | Expired |
| US4620215A | Integrated circuit packaging systems with double surface heat dissipation | Electricity | 68 | Expired |
| US4612612A | Virtually addressed cache | Physics | 67 | Expired |
| US5122978A | Pulse width measurement technique | Physics | 65 | Expired |
| US5095424A | Computer system architecture implementing split instruction and operand cache line-pair-state management | Physics | 61 | Expired |
| US5553285A | File system for a plurality of storage classes | Emerging Cross-Sectional Technologies | 61 | Expired |
| US4805195A | Selectable timing delay circuit | Electricity | 59 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.