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Class Information
Number: 400/100
Name: Typewriting machines > Plural-key-actuated typewriter (e.g., permutative key-board)
Description: Subject matter wherein significance is attributed to a typewriter in which a single type-face* element is caused to be impressed against a record-medium* to imprint a single character* symbol, the actuation of said single type-face being initiated or powered by the pressing of a plurality of key* elements on the key-board*.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7458320 |
Polymer for heat-sensitive lithographic printing plate precursor |
Dec. 2, 2008 |
| 6854906 |
Ergonomic keyboard tilted forward with Dvorak key layout |
Feb. 15, 2005 |
| 6837633 |
Stroke-based input of characters from an arbitrary character set |
Jan. 4, 2005 |
| 6690303 |
Character input method |
Feb. 10, 2004 |
| 6053646 |
Keyball |
Apr. 25, 2000 |
| 5993089 |
8-bit binary code for use as an 8-dot braille arrangement and data entry system and method for 8-key chordic binary keyboards |
Nov. 30, 1999 |
| 5984548 |
Data entry system |
Nov. 16, 1999 |
| 5941648 |
Personal digital assistant having a foldable keyboard component |
Aug. 24, 1999 |
| 5924803 |
Data input device using combined numeric inputs to encode characters |
Jul. 20, 1999 |
| 5861821 |
Keyboard-type input apparatus |
Jan. 19, 1999 |
| 5828323 |
High speed keyboard for computers |
Oct. 27, 1998 |
| 5764164 |
Ergonomic hand-attachable controller |
Jun. 9, 1998 |
| 5288158 |
One handed-keyboard |
Feb. 22, 1994 |
| 5281966 |
Method of encoding alphabetic characters for a chord keyboard |
Jan. 25, 1994 |
| RE34304 |
Quasi-steno keyboard for text entry into a computer |
Jul. 6, 1993 |
| 5197811 |
Keyboard |
Mar. 30, 1993 |
| 5189416 |
Chordal keyboard method and apparatus |
Feb. 23, 1993 |
| 5186555 |
Key arrangement for word processor or the like electrode instrument or machine |
Feb. 16, 1993 |
| 4937778 |
System for selectively modifying codes generated by a touch type keyboard upon detecting of predetermined sequence of make codes and break codes |
Jun. 26, 1990 |
| 4911565 |
Device for one-handed generation of alpha-numberic characters |
Mar. 27, 1990 |
| 4849732 |
One hand key shell |
Jul. 18, 1989 |
| 4836700 |
Data entry system |
Jun. 6, 1989 |
| 4783645 |
Quasi-steno keyboard for text entry into a computer |
Nov. 8, 1988 |
| 4775255 |
Ternary chord-type keyboard |
Oct. 4, 1988 |
| 4737040 |
Keyboard device and method for entering Japanese language text utilizing Romaji character notation |
Apr. 12, 1988 |
| 4694280 |
Keyboard entry system |
Sep. 15, 1987 |
| 4679030 |
Chording keyboard for generating binary data |
Jul. 7, 1987 |
| 4655621 |
Combinatorial keyboards which encode characters and a space |
Apr. 7, 1987 |
| 4638306 |
Keyboard entry system |
Jan. 20, 1987 |
| 4555193 |
Keyboards including color coding and one handed operation |
Nov. 26, 1985 |
| 4543563 |
Mechanically-actuated transparent touchbars and touchplates |
Sep. 24, 1985 |
| 4543562 |
Mechanically-actuated touchbars and touchplates using multiple-closure switches |
Sep. 24, 1985 |
| 4516939 |
Finger control system |
May. 14, 1985 |
| 4490056 |
Combinational keyboard utilizing sequential operation of keys |
Dec. 25, 1984 |
| 4467321 |
Chording keyboard for generating binary data |
Aug. 21, 1984 |
| 4443789 |
Keyboard |
Apr. 17, 1984 |
| 4381502 |
Method and apparatus for character generation |
Apr. 26, 1983 |
| 4360892 |
Portable word-processor |
Nov. 23, 1982 |
| 4344069 |
Method and apparatus for character generation |
Aug. 10, 1982 |
| 4159471 |
Communication system using binary compatible characters |
Jun. 26, 1979 |
| 4042777 |
One-handed keyboard and its control means |
Aug. 16, 1977 |
| 3970185 |
Syllabic typewriter |
Jul. 20, 1976 |
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