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Class Information
Number: 400/368
Name: Typewriting machines > Having rotated power drive intermittently applied for type-bar actuation > For repeat-type action
Description: Subject matter wherein the typewriter is driven by a power drive and is capable of an operation in which a typist presses one particular character*-key* element and the type-face* corresponding to said key will impact the record-medium* again and again to produce a succession of character symbols during the one pressing of the key element, all of which symbols are the same character.

Sub-classes under this class:

Class Number Class Name Patents
400/369 With prevention of repeat typing 6

Patents under this class:

Patent Number Title Of Patent Date Issued
4804278 Key input apparatus provided with a key input buffer Feb. 14, 1989
4587663 Conversation device with space and feed movement related to actuation time of control key May. 6, 1986
4375922 Character printing system in electronic data processing apparatus such as electronic calculators Mar. 8, 1983
4323888 Keyboard system with variable automatic repeat capability Apr. 6, 1982
4299503 Character selection mechanism for a typewriter Nov. 10, 1981
4274752 Keyboard multiple switch assembly Jun. 23, 1981
4217056 Type action for a power-driven typewriter Aug. 12, 1980
4191483 Typewriter key action Mar. 4, 1980
4108557 Error correcting typewriter Aug. 22, 1978
3987885 Automatic single and repeat function mechanism for typewriters Oct. 26, 1976
3976181 Typing machine repeat key action Aug. 24, 1976

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