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| Number | Title | Issue Date |
| 4846598 | One-handed keyboard A one-handed keyboard is disclosed which includes a stationary base and a rocking keyboard which is mounted for rocking movement between a normal level position and right and left depressed positions. A selector key is mounted on the rocking keyboard for ... | 07/11/1989 |
| 3944043 | Shift mechanism in syllabic typewriters In typewriters comprising groups of type-bars, each group having a distinct printing point, each group being supported by a particular sector and certain sectors being movable independently from the others: A shift mechanism which allows the typist to put all ... | 03/16/1976 |
