US3560964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard unit
Assignee: Lanteris Space LLC
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Filing: 1968-12-31
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Granted: 1971-02-02
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Expires: 1988-12-31
Abstract
Abstract A MULTIPLE PAGE KEYBOARD UNIT USED IN COMPUTER ORIENTED DISPLAY TERMINALS FOR CONTROL, SWITCHING, A SIMILAR PURPOSES. A KEYBOARD IS COVERED BY THE PAGES OF ANY ONE OF A PLURALITY OF SPECIAL BOOKS, THE KEYS OF THE KEYBOARD PROTRUDING THROUGH APERTURES IN THE PAGES. THE FUNCTION OF A GIVEN KEY IS DETERMINED BOTH BY THE BOOK WHICH IS IN PLACE ON THE KEYBOARD, AND BY THE PAGE TO WHICH THAT BOOK IS OPENED. THIS IS ACCOMPLISHED BY AN ARRANGEMENT OF SWITCH MEANS WHICH SENSES BOTH THE IDENTITY OF THE BOOK AND THE PAGE TO WHICH THE BOOK IS OPENED.
Inventors
- 👤 Stuart W Bedell
- 👤 Robert L Clenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
G; G06; G06C; G06C7/00; G06C7/02; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/023; G06F3/0238
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |