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| Number | Title | Issue Date |
| 4433925 | Manually-operated dot printer for pocket sized calculators A manually operated dot printer designed for use in a pocket sized calculator or a small sized electronic device includes a printing head which is manually movable across a sheet of printing paper in one direction. A pulse generating circuit produces a si... | 02/28/1984 |
| 4029192 | Digital circuit for controlling the return speed of a business machine carriage A digital electrical circuit for selectively activating a clutch mechanism for controlling the return speed of a business machine carriage. A carriage speed pulse transducer provides a series of sync pulses with intervals between each sync pulse being a f... | 06/14/1977 |
