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patent | score | priority | expiry | expired | references | current assignee | title |
---|---|---|---|---|---|---|---|
4123747 | 1 | 1977-05-20 | 1997-05-20 | 1 | 129 | International Business Machines Corporation; | Identity verification method and apparatus |
4500750 | 4 | 1981-12-30 | 2002-02-19 | 1 | 78 | International Business Machines Corporation; | Cryptographic application for interbank verification |
4969130 | 7 | 1989-09-29 | 2009-09-29 | 1 | 103 | WESTERNGECO, L L C ; | System for monitoring the changes in fluid content of a petroleum reservoir |
4335965 | 45 | 1978-07-07 | 1999-06-22 | 1 | 5 | DRESSER INDUSTRIES, INC , A CORP OF DE ; | Fiber-resin blending technique |
4260265 | 53 | 1978-07-07 | 1998-07-07 | 1 | 4 | DRESSER INDUSTRIES, INC , A CORP OF DE ; | Fiber-resin blending technique |