US3240427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard method, apparatus and system for data transmission
Assignee: Individual
•
Filing: 1962-06-11
•
Granted: 1966-03-15
•
Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Jimmie L Holman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:04
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/16; H; H04; H04M; H04M11/00; H04M11/06; H04M11/066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN COMBINATION, A CALCULATOR HAVING A KEYBOARD PLATE AND A PLURALITY OF KEY BARS EXTENDING THERETHROUGH, A PRINTED CIRCUIT PLATE APERTURED TO PASS SAID KEYBARS, INDIVIDUAL CIRCUIT-CLOSING CONTACTS CARRIED BY SAID CIRCUIT PLATE ADJACENT TO AT LEAST SOME OF SAID RESPECTIVE KEY BARS, AND MEANS ON EACH CORRESPONDING KEY BAR FOR DIRECTLY OPERATING A RESPECTIVE ONE OF SAID CONTACTS UPON THE DEPRESSION OF SAID KEY BAR.
Claim 2
Dependent Claim
66 words
IN COMBINATION, A CALCULATOR HAVING A KEYBOARD PLATE AND A PLURALITY OF KEY BARS EXTENDING THERETHROUGH, A PRINTED CIRCUIT PLATE APERTURED TO PASS SAID KEYBARS, INDIVIDUAL CIRCUIT-CLOSING CONTACTS CARRIED BY SAID CIRCUIT PLATE ADJACENT TO AT LEAST SOME OF SAID RESPECTIVE KEY BARS, AND MEANS ON EACH CORRESPONDING KEY BAR FOR DIRECTLY OPERATING A RESPECTIVE ONE OF SAID CONTACTS UPON THE DEPRESSION OF SAID KEY BAR.
References Cited (Backward Citations)
FR375852A
Cited
US1078626A
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US1190176A
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US1773392A
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US1701436A
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US1972985A
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US2566278A
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US2528394A
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US2810785A
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US2964740A
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US2932816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |