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Class Information
Number: 400/121
Name: Typewriting machines >

Sub-classes under this class:

Class Number Class Name Patents
400/1 Including justification or quadding of print-line 1
400/100 Plural-key-actuated typewriter (e.g., permutative key-board) 46
400/103 Code-printing typewriter (e.g., for printing a pattern or mark) 125
400/109 Foreign language or braille typewriter 58
400/112 Annular typewriter (e.g., for typing around circumference of platen) 5
400/116 Music-roll or musical-notation typewriter 3
400/118.1 Typing by heated die 12
400/118.2 Typing by other than type-face or type-die 37
400/127 Typing to produce embossed character 39
400/135 Typing to produce pierced character 6
400/139 Including type-set-assemblage mounted on carrier and relatively movable for selection and for impact of type-face 17
400/16 For typing or forming continuous or discontinuous line (e.g., by "liner") 4
400/176 Having fluid-pressure power drive 10
400/184 Having typewriter-controlled reciprocable electromagnetic drive for plural functions in same typewriter 10
400/185 Having power-driven operator for plural functions 146
400/188 For typing on reverse surface of record-medium 127
400/191 Including interposed inking device (e.g., ribbon) for record-medium 17
400/23 For typing on flat record-medium or against flat platen 51
400/251 Case-shift mechanism 1
400/279 Control of print position along print-line by signal generated by programmed-control-system 347
400/283 Carriage or carriage-moving or movement-regulating mechanism 88
400/359 Having typewriter-controlled reciprocable electromagnetic drive for type bar actuation in same typewriter 1
400/365 Having rotated power drive intermittently applied for type-bar actuation 1
400/383 Type-bar-action mechanism or type-face on type-bar or type-face inker 0
400/472 Key-board or key lever-actuating mechanism 468
400/497 With control of "carbon paper" for typing plural simultaneous copies by single impression (e.g., on "manifold set") 1
400/50 Including delay means for preventing malfunction in powered typewriter 10
400/521 For typing on card in card holder 34
400/53 Including adjustment means to compensate for wear 19
400/54 Safety switch or condition-responsive-cutoff switch for electrically powered typewriter 124
400/545 For line-spacing by incremental rotation of platen 10
400/55 Including adjustment for optimum printing plane 167
400/578 Sheet or web (e.g., record-medium feeding mechanism) 187
400/61 Including control of format and selection of type-face by programmed control-system (e.g., input typewriter) 546
400/648 Platen or platen-moving mechanism 71
400/663 Locking or interlocking mechanism 54
400/679 Means auxiliary to typewriting function 43
400/70 Including selection of type-face by programmed-control-system or by remote control 415
400/719 Miscellaneous 99
400/76 Including control of format by programmed-control-system 784
400/77 Typewriter controls other information recorder 22
400/82 Including plural, independently supported key-boards, platens, or type-set assemblages 198
400/83 Displaying typewriter-formed representation of print-line 212
400/86 Operating by sound 13
400/87 For operation by handicapped user 28
400/88 Pocket typewriter 385
400/89 Key reassignment 7
400/900 Chemical-symbol character 3
400/901 Continuously rotating type-head 3
400/902 Stepping-motor drive for web feed 51
400/903 Stepping-motor drive for carriage feed 73
400/904 Subscript or superscript character 20
400/91 Stenographic typewriter 29
400/95 Logotype typewriter (e.g., word typing) 8

Patents under this class:

Patent Number Title Of Patent Date Issued

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