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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) |
161 |
| 400/717 |
Attachment for holding an article (e.g., pencil, eraser, etc.) |
17 |
| 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 |
270 |
| 400/703 |
Indicator means |
139 |
| 400/701 |
Means for cleaning, or facilitating cleaning of, type-face |
42 |
| 400/680 |
Means for collapsing typewriter or support for record-medium or copy |
42 |
| 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 |
39 |
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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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