Patent US5197811A successfully refreshed from Google Patents.
US5197811A
Expired / Lapsed
US
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Keyboard
Assignee: Individual
•
Filing: 1992-05-26
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Granted: 1993-03-30
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Expires: 2012-05-26
Abstract
Abstract A keyboard operable by one hand includes a first group of four elongated finger keys extending vertically in parallel spaced relation so as to be accessible by the four fingers of a user's hand, and a second group of thumb keys extending laterally of the first group and spaced vertically with respect to each other so as to be accessible by the user's thumb. The keyboard may include a first section operable by one hand and having the above two groups of keys for selecting alphabetical characters, and a second section operable by the second hand having further keys for selecting numerical characters, punctuation and operational controls.
Inventors
- 👤 Maxim D. Levinrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:01
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/023; G06F3/0233; G06F3/0235; B; B41; B41J; B41J5/00; B41J5/08; B41J5/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A keyboard operable by one hand, comprising: a first group including four elongated finger keys extending generally vertically in parallel spaced relation so as to be accessible by the four fingers of a user's hand; and a second group of keys extending in horizontal alignment with and laterally of the first group and spaced vertically with respect to each other so as to be accessible by the user's thumb such as to permit a selected finger key and he thumb key aligned therewith to be simultaneously depressed by he user's hand to select a character of the keyboard.
Claim 2
Dependent Claim
98 words
A keyboard operable by one hand, comprising: a first group including four elongated finger keys extending generally vertically in parallel spaced relation so as to be accessible by the four fingers of a user's hand; and a second group of keys extending in horizontal alignment with and laterally of the first group and spaced vertically with respect to each other so as to be accessible by the user's thumb such as to permit a selected finger key and he thumb key aligned therewith to be simultaneously depressed by he user's hand to select a character of the keyboard.
Claim 3
Dependent Claim
37 words
The keyboard according to claim 1, wherein each group of keys is marked with all the characters of the alphabet such that each alphabetical character is selected by simultaneously depressing a finger key and a thumb key.
Claim 4
Dependent Claim
36 words
The keyboard according to claim 2, wherein each finger key is marked with a plurality of characters extending vertically of the key, with each character marking being aligned with the thumb key for he respective character.
Claim 5
Dependent Claim
37 words
The keyboard according to claim 1, further including a Space bar extending below said first and second groups of keys so as to be accessible to the thumb or heel of the user's hand adjacent the wrist.
Claim 6
Dependent Claim
26 words
The keyboard according to claim 1, wherein the keys of said second group are of arcuate configuration and curve upwardly towards said first group of keys.
Claim 7
Dependent Claim
17 words
The keyboard according to claim 1, wherein there are seven keys in said second group of keys.
Claim 8
Dependent Claim
34 words
The keyboard according to claim 1, wherein the keys of the first group are marked with the alphabetical characters in a substantially alphabetical sequence, with each key including one character in the respective sequence.
Claim 9
Dependent Claim
45 words
A keyboard including a first section operable by one hand and having the two groups of keys according to claim 1 for selecting alphabetical characters, and a second section operable by a second hand having further keys for selecting numerical characters, punctuation and operational controls.
Claim 10
Dependent Claim
16 words
The keyboard according to claim 8, wherein said second section is separable from said first section.
Claim 11
Dependent Claim
16 words
The keyboard according to claim 8, wherein said section is pivotally mounted to said first section.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-29 | 1996-09-28 | 1997-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-29 | 2000-09-28 | 2001-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-29 | 2004-09-28 | 2005-03-30 | $7700.00 | Window Closed / Lapsed |