Patent US3126646A successfully refreshed from Google Patents.
US3126646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio-visual teaching machine
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:53
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/06; G09B5/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A TEACHING DEVICE COMPRISING A PROJECTOR FOR PRESENTING A FILM CONTAINING A SUCCESSION OF INSTRUCTIVE UNITS EACH OF WHICH IS CONSTITUTED BY A SERIES OF INFORMATION SLIDES, THE NEXT TO THE LAST SLIDE IN EACH SERIES CONTAINING QUESTIONS AND THE FINAL SLIDE CONTAINING ANSWERS THERETO, A SOUND REPRODUCER HAVING A SOUND TRACK CARRYING A SUCCESSION OF NARRATIONS APPROPRIATE TO THE SERIES OF SLIDES IN EACH OF THE CORRESPONDING INSTRUCTIVE UNITS AND INCLUDING CONTROL SIGNALS, A CONTROL SYSTEM RESPONSIVE TO SAID SIGNALS TO CAUSE THE STEP-WISE PRESENTATION OF THE SLIDES IN EACH OF SAID SERIES AND TO ARREST SAID PRESENTATION AND SAID SOUND TRACK WHEN SAID QUESTION SLIDE IS PRESENTED, AND MEANS RESPONSIVE TO A STUDENT ACTION TO CAUSE SAID FILM TO STEP TO SAID ANSWERING SLIDE.
Claim 2
Dependent Claim
126 words
A TEACHING DEVICE COMPRISING A PROJECTOR FOR PRESENTING A FILM CONTAINING A SUCCESSION OF INSTRUCTIVE UNITS EACH OF WHICH IS CONSTITUTED BY A SERIES OF INFORMATION SLIDES, THE NEXT TO THE LAST SLIDE IN EACH SERIES CONTAINING QUESTIONS AND THE FINAL SLIDE CONTAINING ANSWERS THERETO, A SOUND REPRODUCER HAVING A SOUND TRACK CARRYING A SUCCESSION OF NARRATIONS APPROPRIATE TO THE SERIES OF SLIDES IN EACH OF THE CORRESPONDING INSTRUCTIVE UNITS AND INCLUDING CONTROL SIGNALS, A CONTROL SYSTEM RESPONSIVE TO SAID SIGNALS TO CAUSE THE STEP-WISE PRESENTATION OF THE SLIDES IN EACH OF SAID SERIES AND TO ARREST SAID PRESENTATION AND SAID SOUND TRACK WHEN SAID QUESTION SLIDE IS PRESENTED, AND MEANS RESPONSIVE TO A STUDENT ACTION TO CAUSE SAID FILM TO STEP TO SAID ANSWERING SLIDE.
References Cited (Backward Citations)
US2987828A
Cited
US2985069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |