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Class Information
Number: 400/491
Name: Typewriting machines > Key-board or key lever-actuating mechanism > Key-cap or key-stem structure > Including cushioning means (e.g., yieldable surface)
Description: Subject matter wherein either said key* cap or said key stem includes means that tends to absorb some of the force exerted by the typist"s fingers as the key elements are pressed during typing.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7554045 |
Linear pressure sensor |
Jun. 30, 2009 |
| 7059790 |
Keyboard and method of making the same |
Jun. 13, 2006 |
| 7040824 |
Gel-cushioned accessory for a keyboard |
May. 9, 2006 |
| 6969815 |
Keyboard key capable of lowering its overall height |
Nov. 29, 2005 |
| 6967056 |
Key sheet |
Nov. 22, 2005 |
| 6964532 |
Key array structure |
Nov. 15, 2005 |
| 6880994 |
Keyboard and electronic apparatus having the same |
Apr. 19, 2005 |
| 6879317 |
Collapsible data entry panel |
Apr. 12, 2005 |
| 6808328 |
Shiftable keyboard tray and method of use |
Oct. 26, 2004 |
| 6805507 |
Keyboard device |
Oct. 19, 2004 |
| 6788294 |
Device and method for implementing a key |
Sep. 7, 2004 |
| 6761494 |
Button apparatus with a complex elastic unit |
Jul. 13, 2004 |
| 6672781 |
Reduced noise key unit |
Jan. 6, 2004 |
| 6655863 |
Pen-sized keyboard arrangement |
Dec. 2, 2003 |
| 6657139 |
Keyboard |
Dec. 2, 2003 |
| 6585435 |
Membrane keyboard |
Jul. 1, 2003 |
| 6497521 |
No-impact keyboard |
Dec. 24, 2002 |
| 6427310 |
Method for fabricating a print engine chassis for supporting an imaging drum and printhead translation assembly |
Aug. 6, 2002 |
| 6390699 |
Keyboard with moveable base plate providing key travel |
May. 21, 2002 |
| 6382854 |
Computer keyboard enhancement kit |
May. 7, 2002 |
| 6379061 |
Silicon cap for use in the pointing stick device |
Apr. 30, 2002 |
| 6183149 |
Impact absorbing keyboard, contoured to the natural shape of the hand |
Feb. 6, 2001 |
| 6107995 |
Inflatable keyboard |
Aug. 22, 2000 |
| 6068416 |
Keyboard switch |
May. 30, 2000 |
| 5933133 |
Low-impact keyboard |
Aug. 3, 1999 |
| 5899616 |
Impact absorbing keyboard, contoured to the natural shape of the hand and method of using |
May. 4, 1999 |
| 5813777 |
Stress relieving keys |
Sep. 29, 1998 |
| 5456541 |
Key unit of a keyboard |
Oct. 10, 1995 |
| 5290115 |
Cushioning means for keyboard keys |
Mar. 1, 1994 |
| 5183346 |
Keycap overlay snap-on system |
Feb. 2, 1993 |
| 4657419 |
Information carrier, having a roughened surface, method of manufacturing same, and apparatus therefor |
Apr. 14, 1987 |
| 4500218 |
Keyboard key with embedded top character |
Feb. 19, 1985 |
| 4362408 |
Means for avoiding accidental actuation of a critical function key |
Dec. 7, 1982 |
| 4039068 |
Keyboard of elastic material for office machines |
Aug. 2, 1977 |
| 3964594 |
Keyboard of elastic material for office machines |
Jun. 22, 1976 |
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