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| Number | Title | Issue Date |
| 5322376 | Serial printing apparatus including an error correcting capability and having a memory A recording apparatus has a memory for storing information entered from a key input device, whereby the stored information can be used to rapidly and precisely position erasing means at a previously recorded indicium for erasure thereof. The apparatus may... | 06/21/1994 |
| 4552474 | Backspace device in typewriter A backspace device in a typewriter comprising: an interposer operable by the operation of a key lever; a cycle bail operable by the interposer; a cycle clutch for intermittently transmitting a driving force from a driving source to a main shaft so that th... | 11/12/1985 |
| 4286889 | Error correcting typewriter with electronically controlled backspacing to facilitate perfect overstrike of errors An error correcting typewriter wherein a backspace correction key is operative to read an incorrect character from memory, to in turn reversely move a stepper motor controlled carriage twice the width of a character in error and then forwardly the width o... | 09/01/1981 |
| 4285605 | Escapement mechanism and backspace mechanism for a moving paper carriage typewriter having dual pitch capability A mechanism which will function to allow the escapement of the carriage of a typewriter in one of two predetermined escapement pitches and be capable of backspace operation from a single backspace input for both pitches regardless of which escapement pitc... | 08/25/1981 |
| 4273455 | Justifying text writing composing machine A mechanism which provides bi-directional movement of the carrier of an electric typewriter incorporating proportional spacing. A ratchet arrangement is operable in both directions to provide the desired proportional spacing increments, with rotation of a... | 06/16/1981 |
| 4252452 | Arabic language typewriter An Arabic language or other right to left writing typewriter having mechanism normally effecting letter feeding movement from right to left in response to type actions is provided with additional mechanism selectively operatively positionable to effect po... | 02/24/1981 |
| 4245918 | Erase through tab An electronic typewriter which has the capability of erasing characters automatically and which has the further improved capability of being able to back through unused space on the line, which results after a tabulation command, thereby allowing the repo... | 01/20/1981 |
| 4108557 | Error correcting typewriter An error correction system for a typewriter in which a silent type action with a blank type face is operatively connected and synchronized to initiate a backspace action and elevate and feed an error correction ribbon in advance of the striking of the bla... | 08/22/1978 |
| 4067430 | Typewriter carriage movement mechanism There is disclosed a typewriter carriage control mechanism which is used with a single element print head which is constructed and arranged for transverse movement across the typewriter in which a ratchet wheel is connected to the regular spring for movin... | 01/10/1978 |
| 4022312 | Semi-automatic centering control Disclosed is a control mechanism and device for conditioning a typewriter to backspace on every other depression of a keylever and at the same time to prevent printing on all depressions of keylevers. Additionally, the typewriter is conditioned to not pri... | 05/10/1977 |
| 3949855 | Typewriter carriage jam precluding and action jam release mechanisms A typewriter is provided with carriage control mechanisms such that more than one carriage control function can be initiated at one time. The arrangement of carriage function controls permit a dominant carriage movement to prevail, and less dominant carri... | 04/13/1976 |
