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Class Information
Number: 400/487
Name: Typewriting machines > Key-board or key lever-actuating mechanism > Key-board arranged according to character location > Color-coded key-board
Description: Subject matter wherein significance is attributed to the color or tint of the key* elements that are positioned on the key-board*, the elements being grouped in accordance with color.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7366313 |
Mixing console having visual marking system applied to manual operators with subgrouping |
Apr. 29, 2008 |
| 7220431 |
Methods and compositions for applying pharmacologic agents to the ear |
May. 22, 2007 |
| 7023364 |
Medical keyboard |
Apr. 4, 2006 |
| 6964531 |
Light module and keyboard utilizing same |
Nov. 15, 2005 |
| 6932525 |
Keyboard arrangement for easy acquisition of typing skills |
Aug. 23, 2005 |
| 6850225 |
Color-coded tactile data-entry devices |
Feb. 1, 2005 |
| 6632038 |
Keyboard arrangement for easy acquisition of typing skills |
Oct. 14, 2003 |
| 6543946 |
Combination printer |
Apr. 8, 2003 |
| 5954437 |
Computer keyboard system enabling users to locate keys of letters, radicals and phonetic symbols quickly |
Sep. 21, 1999 |
| 5905493 |
Color coded instructional scheme for computers and the like system, method and article of manufacture |
May. 18, 1999 |
| 5790103 |
Ergonomic keyboard entry system |
Aug. 4, 1998 |
| 5700097 |
Children's computer keyboard |
Dec. 23, 1997 |
| 5626429 |
Keyboard arrangement to maximize one-handed typing speed and training for engineering and architectural computer assisted drawing and design or disabled typists |
May. 6, 1997 |
| 5452960 |
Children's computer keyboard |
Sep. 26, 1995 |
| 4940346 |
Keyboard assembly and typing method |
Jul. 10, 1990 |
| 4602878 |
Ideographic word processor |
Jul. 29, 1986 |
| 4555193 |
Keyboards including color coding and one handed operation |
Nov. 26, 1985 |
| 4544276 |
Method and apparatus for typing Japanese text using multiple systems |
Oct. 1, 1985 |
| 3964594 |
Keyboard of elastic material for office machines |
Jun. 22, 1976 |
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