Patent US4083889A successfully refreshed from Google Patents.
Patent US3350792A successfully refreshed from Google Patents.
US3350792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio visual teaching device
Assignee: Individual
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Filing: 1965-04-23
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Granted: 1967-11-07
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Expires: 1985-04-23
Abstract
No abstract record available.
Inventors
- 👤 Ralph V Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:38
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/06; G09B5/062
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A TEACHING DEVICE FOR SIMULTANEOUSLY PROVIDING DIFFERENT AURAL AND VISUAL IMPRESSIONS TO A STUDENT IN A SUCCESSIVE MANNER COMPRISING: A TABLE-LIKE STRUCTURE HAVING A PLURALITY OF STUDENT STATIONS EACH HAVING A DISPLAY AREA ASSOCIATED THEREWITH, ROTATABLE DRUMS CARRIED BY SAID STRUCTURE SUBJACENT SAID DISPLAY AREAS, DRIVE MEANS FOR ACTUATING SAID DRUMS INCLUDING AN ELECTRIC MOTOR, LESSON-PROGRAMMING MEANS CARRIED BY SAID STRUCTURE AND CAPABLE OF MOMENTARILY ENERGIZING SAID MOTOR AND OF ENERGIZING SPEAKER MEANS, SPEAKER MEANS IN CIRCUIT WITH SAID LESSON PROGRAMMING MEANS, AND INDICIA BEARING MEANS REMOVABLY CARRIED BY SAID DRUMS.
Claim 2
Dependent Claim
91 words
A TEACHING DEVICE FOR SIMULTANEOUSLY PROVIDING DIFFERENT AURAL AND VISUAL IMPRESSIONS TO A STUDENT IN A SUCCESSIVE MANNER COMPRISING: A TABLE-LIKE STRUCTURE HAVING A PLURALITY OF STUDENT STATIONS EACH HAVING A DISPLAY AREA ASSOCIATED THEREWITH, ROTATABLE DRUMS CARRIED BY SAID STRUCTURE SUBJACENT SAID DISPLAY AREAS, DRIVE MEANS FOR ACTUATING SAID DRUMS INCLUDING AN ELECTRIC MOTOR, LESSON-PROGRAMMING MEANS CARRIED BY SAID STRUCTURE AND CAPABLE OF MOMENTARILY ENERGIZING SAID MOTOR AND OF ENERGIZING SPEAKER MEANS, SPEAKER MEANS IN CIRCUIT WITH SAID LESSON PROGRAMMING MEANS, AND INDICIA BEARING MEANS REMOVABLY CARRIED BY SAID DRUMS.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |