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Class Information
Number: 400/679
Name: Typewriting machines > Means auxiliary to typewriting function
Description: Subject matter wherein significance is attributed to structure that is part of a typewriter to aid a typist in using a typewriter, or significance is attributed to a device used in conjunction with a typewriter, which device is connected to, or may be disconnected from, a typewriter, and which device is used by a typist in the operation of a typewriter, but which structure or device does not itself effect the imprint of a character*, a character-space* or word-space*, or a function* of the typewriter.

Sub-classes under this class:

Class Number Class Name Patents
400/715 Attachment for guiding fingers or hands of typist (e.g., hand rest) 166
400/717 Attachment for holding an article (e.g., pencil, eraser, etc.) 18
400/716 Attachment for illuminating or viewing (e.g., prism, etc.) 11
400/713 Attachment for shielding or screening record-medium or typewriter (e.g., against wind, etc.) 21
400/686 Buffer (e.g., dashpot, of particular material, etc.) for movable typewriter element 18
400/691 Frame, casing, or support for typewriter 331
400/703 Indicator means 145
400/701 Means for cleaning, or facilitating cleaning of, type-face 49
400/680 Means for collapsing typewriter or support for record-medium or copy 44
400/695 Means for correcting typing errors (e.g., by abrasive eraser, etc.) 43
400/688 Means for increasing typewriter noise 1
400/689 Means for muffling typewriter noise 42

Patents under this class:

Patent Number Title Of Patent Date Issued
8218301 Keyboard Jul. 10, 2012
7824118 Printer comprising a flexible member extending over the antennas of RFID labels wound on a roll Nov. 2, 2010
7755883 Connection structure and data processing apparatus therewith Jul. 13, 2010
7641407 Prevention of damage to an optical disk in a printer due to inadvertent handling Jan. 5, 2010
7537404 Modular printer May. 26, 2009
7385808 Electronic apparatus with keyboard Jun. 10, 2008
7261478 Systems and methods for handling defective RFID media according to available printer output options Aug. 28, 2007
7172277 Transfer pressure roll, transfer device and image recording apparatus Feb. 6, 2007
7153050 Collapsible keyboard Dec. 26, 2006
6979141 Identification cards, protective coatings, films, and methods for forming the same Dec. 27, 2005
6948871 Image processing device Sep. 27, 2005
6932526 Multi-stage pre-transfer substrate heating assembly Aug. 23, 2005
6887004 Keyboard support platform May. 3, 2005
6863393 Heat and airflow management for a printer dryer Mar. 8, 2005
6846121 Modular printer Jan. 25, 2005
6846073 Ink jet printer and its thick film printing method Jan. 25, 2005
6644876 Method and apparatus for printer cartridge identification Nov. 11, 2003
6508601 Charging contact plate Jan. 21, 2003
6120199 Ink jet printing apparatus with heating unit and insulating member Sep. 19, 2000
5984549 Multiple key depressing device Nov. 16, 1999
5924808 Paper catching tray for electronic printers and other devices Jul. 20, 1999
5913628 Preformed paper catching tray for electronic printers and other devices Jun. 22, 1999
5628573 Document brake for document processing devices May. 13, 1997
5564844 Automatic keyboard moving apparatus Oct. 15, 1996
D372936 Control unit with a printer Aug. 20, 1996
5415485 Ribbon cartridge reloader May. 16, 1995
5246300 Apparatus and method for removing paper jams from printers Sep. 21, 1993
5192152 Switch actuator Mar. 9, 1993
5190387 Keyboard accouterment tray Mar. 2, 1993
5054944 Serial printer having a carrier cable connected to a movable print head Oct. 8, 1991
4969762 Typewriter label dispensing device Nov. 13, 1990
4842431 Multi-speed cooling fan for printing device Jun. 27, 1989
4806032 Conical vent containing capillary bore Feb. 21, 1989
4795888 Variable keystroke pressure apparatus Jan. 3, 1989
4600319 Control for dot matrix printers operating in harsh environments Jul. 15, 1986
4518272 Position indicator means for a high speed printer or the like May. 21, 1985
4438692 Printing apparatus with cooling of hammer printing coils Mar. 27, 1984
4426165 Printing device with integrated print head fastening and adjustment Jan. 17, 1984
4388009 Cooling system for a line printer Jun. 14, 1983
4364682 Acoustic member mounting means for use in typewriters Dec. 21, 1982
4294557 Shield for typewriter keyboard and cylinder Oct. 13, 1981
4055905 Teaching typewriter Nov. 1, 1977
4033255 Print hammer actuator for dot matrix printers Jul. 5, 1977

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