Patent US4322798A successfully refreshed from Google Patents.
Patent US3396827A successfully refreshed from Google Patents.
US3396827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tactile keyboard
Assignee: Sweda International Inc
•
Filing: 1966-04-25
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Granted: 1968-08-13
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Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Edward M Harwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:47
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/0202; G06F3/0219; G06F3/023; G06F3/0233; G06F3/0234; G06F3/0235; H; H01; H01H; H01H13/00; H01H13/70; H01H13/84; H01H9/00; H01H9/18; H01H2009/189; H01H2217/00; H01H2217/018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
219 words
A KEYBOARD: COMPRISING A FIRST PLURALITY OF KEYS EACH HAVING DISPOSED THEREON TACTILE IDENTIFICATION INDICIA IN THE FORM OF A PAIR OF SPACED SURFACE DEFORMATIONS; A SECOND PLURALITY OF KEYS EACH HAVING DISPOSED THEREON TACTILE INDENTIFICATION INDICIA IN THE FORM OF A CONTINUOUS ELONGATED SURFACE DEFORMATION; A PLURALITY OF HOME KEYS EACH HAVING DISPOSED THEREON SPECIAL TACTILE IDENTIFICATION INDICIA; A PLURALITY OF KEYS, SAID SECOND PLURALITY OF SAID FIRST PLURALITY OF KEYS, SAID SECOND PLURALITY OF KEYS, SAID PLURALITY OF HOME KEYS, AND SAID PLURALITY OF OTHER KEYS ALL BEING DISPOSED IN AN ARRAY INCLUDING AT LEAST THREE SIDE BY SIDE ORDINALLY ARRANGED COLUMNS OF AT LEAST NINE KEYS EACH, SAID NINE KEYS IN EACH OF SAID COLUMNS BEING RESPECTIVELY REPRESENTATIVE OF THE DIGITS "1" THROUGH "9," AT LEAST A MAJORITY OF THE KEYS IN EACH OF SAID COLUMNS HAVING TACTILE INDENTIFICATION INDICIA DISPOSED THEREON. WITH AT LEAST ONE OF SAID HOME KEYS DISPOSED IN A FIRST ONE OF SAID COLUMNS AND WITH ALL THE OTHER KEYS UPON WHICH THERE ARE DISPOSED TACTILE INDENTIFICATION INDICA IN SAID FIRST ONE OF SAID COLUMNS ARRANGED WIT THEIR TACTILE INDENTIFICATION INDICIA DISPOSED ALING FIRST IMAGINARY AND PARALLEL LINES, WITH AT LEAST ONE OF SAID HOME KEYS DISPOSED IN A SECOND ONE OF SAID COLUMNS AND WITH ALL THE OTHER KEYS UPON WHICH
Claim 2
Dependent Claim
219 words
A KEYBOARD: COMPRISING A FIRST PLURALITY OF KEYS EACH HAVING DISPOSED THEREON TACTILE IDENTIFICATION INDICIA IN THE FORM OF A PAIR OF SPACED SURFACE DEFORMATIONS; A SECOND PLURALITY OF KEYS EACH HAVING DISPOSED THEREON TACTILE INDENTIFICATION INDICIA IN THE FORM OF A CONTINUOUS ELONGATED SURFACE DEFORMATION; A PLURALITY OF HOME KEYS EACH HAVING DISPOSED THEREON SPECIAL TACTILE IDENTIFICATION INDICIA; A PLURALITY OF KEYS, SAID SECOND PLURALITY OF SAID FIRST PLURALITY OF KEYS, SAID SECOND PLURALITY OF KEYS, SAID PLURALITY OF HOME KEYS, AND SAID PLURALITY OF OTHER KEYS ALL BEING DISPOSED IN AN ARRAY INCLUDING AT LEAST THREE SIDE BY SIDE ORDINALLY ARRANGED COLUMNS OF AT LEAST NINE KEYS EACH, SAID NINE KEYS IN EACH OF SAID COLUMNS BEING RESPECTIVELY REPRESENTATIVE OF THE DIGITS "1" THROUGH "9," AT LEAST A MAJORITY OF THE KEYS IN EACH OF SAID COLUMNS HAVING TACTILE INDENTIFICATION INDICIA DISPOSED THEREON. WITH AT LEAST ONE OF SAID HOME KEYS DISPOSED IN A FIRST ONE OF SAID COLUMNS AND WITH ALL THE OTHER KEYS UPON WHICH THERE ARE DISPOSED TACTILE INDENTIFICATION INDICA IN SAID FIRST ONE OF SAID COLUMNS ARRANGED WIT THEIR TACTILE INDENTIFICATION INDICIA DISPOSED ALING FIRST IMAGINARY AND PARALLEL LINES, WITH AT LEAST ONE OF SAID HOME KEYS DISPOSED IN A SECOND ONE OF SAID COLUMNS AND WITH ALL THE OTHER KEYS UPON WHICH
References Cited (Backward Citations)
US2261115A
Cited
US2351541A
Cited
US2628030A
Cited
US662834A
Cited
US695251A
Cited
US726107A
Cited
US825845A
Cited
US1148721A
Cited
US1718694A
Cited
US1823130A
Cited
US2585699A
Cited
US2892266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |