US3105307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable teaching machines
Assignee: TEACHING MACHINES Inc
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Filing: 1961-04-05
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Granted: 1963-10-01
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Expires: 1981-04-05
Abstract
No abstract record available.
Inventors
- 👤 Iii Dudley E Cornell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:36
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/02; G09B3/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
143 words
IN A TEACHING MACHINE, A PORTABLE HOUSING HAVING AN INCLINED FRONT PANEL PROVIDED WITH A SLOT, A PAIR OF OPPOSITE SIDE WALLS, AN UPPER END WALL, A BACK, AN INNER PANEL MOUNTED BELOW SAID FRONT PANEL AND ADAPTED TO SUPPORT SHEETS THEREON, SAID SHEETS BEING SUCCESSIVELY SLIDABLE UPWARDLY; MEANS IN SAID CABINET FOR GUIDING SAID SHEETS DURING THEIR UPWARD MOVEMENT; MEANS FOR PREVENTING RETRACTIVE MOVEMENT OF SAID SHEETS; A WINDOW MOUNTED IN SAID FRONT PANEL SLOT, SAID WINDOW HAVING A RECESS FOR EXPOSING A PART OF THE UPPERMOST ONE OF SAID SHEETS ON SAID INNER PANEL FOR WRITING; MEANS ON SAID WINDOW FOR OBSTRUCTING THE VIEW OF AN INNER PORTION OF SAID SHEET; SAID WINDOW HAVING AN UPWARDLY EXTENDING SLOT THEREIN TO PROVIDE FOR SELECTIVE UPWARD SLIDING OF THE UPPERMOST SHEET; SAID WINDOW PERMITTING READING OF PRINTED STIMULI ON PORTIONS OF SAID SHEET.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |