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| Number | Title | Issue Date |
| 4259653 | Electromagnetic reciprocating linear actuator with permanent magnet armature A spring-less linear actuator, especially useful as a print wire drive. A permanent magnet armature is driven from a rest position on a pole piece by magnetic repulsion upon energization of a solenoid by a D.C. pulse. The armature is fixed to a print wire... | 03/31/1981 |
