Patent US3605284A successfully refreshed from Google Patents.
US3605284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational device
Assignee: Individual
•
Filing: 1969-02-10
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Granted: 1971-09-20
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Expires: 1989-02-10
Abstract
Abstract MY INVENTION COMPRISES ESSENTIALLY AN AUDIO-VISUAL EDUCATIONAL DEVICE INCLUDING OPTICAL MEANS FOR DISPLAYING A SERIES OF QUESTIONS AND ANSWERS IN ALTERNATING FRAMES AND AN AUDITORY SYSTEM SYNCHRONIZED WITH AND EXPLAINING THE VISUAL ANSWERS, THE ADVANCEMENT OF THE SUCCESSIVE FRAMES BEING DEPENDENT UPON THE SELECTION OF A TRUE OR FALSE ANSWER, WHEREIN A SELCTION OF A TRUE ANSWER ADVANCES THE VISUAL PORTION FORWARD TO THE NEXT QUESTION AND THE SELECTION OF A FALSE ANSWER ADVANCES SAID VISUAL PORTION TO THE CORRECT ANSWER AND CAUSES THE ACTUATION OF THE AUDITORY MEANS.
Inventors
- 👤 Andrew F Kay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:34
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06; G09B7/08
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |