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| Number | Title | Issue Date |
| 4435098 | Office machine escapement disengagement and automatic engagement mechanism An improved typewriter escapement disengagement and engagement mechanism wherein a separator member disengages the escapement mechanism from the carriage rack to prevent damage to the mechanism and/or rack during transport of the typewriter. A restraining... | 03/06/1984 |
| 3985219 | Ribbon cartridge for automatic typewriter function A typewriter ribbon cartridge carrying at least one abutment thereon for engaging one or more typewriter functions and responsive means or mechanism to thereby actuate the typewriter function mechanism when the ribbon cartridge is inserted into the typewr... | 10/12/1976 |
| 3977510 | Automatic function mechanism for typewriters A method and mechanism for automatically performing typewriter functions such as backspacing and disabling the escapement mechanism of a typewriter. A ribbon cartridge carrying actuating abutments is inserted into the typewriter whereupon the abutments en... | 08/31/1976 |
