US3373508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Teaching apparatus
Assignee: HC Electronics Inc
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Filing: 1964-10-29
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Granted: 1968-03-19
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Expires: 1984-10-29
Abstract
No abstract record available.
Inventors
- 👤 Ruth J Holden
- 👤 Scott D Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:06
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
TEACHING APPARATUS OF THE TYPE WHICH COMPRISES AN ENDLESS RECORDING MEDIUM OF PREDETERMINED LENGTH SENSITIVE THROUGHOUT ITS ENTIRE LENGTH, RECORDING MEANS COOPERATING WITH SAID MEDIUM FOR RECORDING SOUNDS THEREON, A MICROPHONE HAVING MEANS FOR SELECTIVELY CONNECTING ITS OUTPUT TO THE RECORDING MEANS TO SELECTIVELY RECORD SOUNDS APPLIED TO THE MICROPHONE ON SAID RECORDING MEDIUM, PLAYBACK MEANS COOPERATING WITH SAID RECORDING MEDIUM FOR REPRODUCING SOUNDS RECORDED THEREON, ERASING MEANS BETWEEN SAID PLAYBACK AND RECORDING MEANS FOR ERASING THE SOUNDS RECORDED ON SAID MEDIUM, MEANS FOR CONTINUOUSLY DRIVING THE RECORDING MEDIUM PAST SAID RECORDING MEANS, PLAYBACK MEANS, AND ERASE MEANS; MEANS MOUNTING SAID PLAYBACK MEANS AT A POSITION SPACED FROM SAID RECORDING MEANS A DISTANCE ALONG THE DIRECTION OF TRAVEL OF SAID MEDIUM EQUAL TO A MAJOR PORTION OF THE LENGTH THEREOF, AND MEANS FOR SIMULTANEOUSLY ENERGIZING SAID RECORDING MEANS, PLAYBACK MEANS, ERASING MEANS AND DRIVE MEANS WHEREBY SOUND IS RECORDED, AND PLAYED BACK ONLY AFTER THE RECORDING MEDIUM HAS TRAVELLED OVER A MAJOR PORTION OF ITS LENGTH, AND THEN ERASED.
Claim 2
Dependent Claim
169 words
TEACHING APPARATUS OF THE TYPE WHICH COMPRISES AN ENDLESS RECORDING MEDIUM OF PREDETERMINED LENGTH SENSITIVE THROUGHOUT ITS ENTIRE LENGTH, RECORDING MEANS COOPERATING WITH SAID MEDIUM FOR RECORDING SOUNDS THEREON, A MICROPHONE HAVING MEANS FOR SELECTIVELY CONNECTING ITS OUTPUT TO THE RECORDING MEANS TO SELECTIVELY RECORD SOUNDS APPLIED TO THE MICROPHONE ON SAID RECORDING MEDIUM, PLAYBACK MEANS COOPERATING WITH SAID RECORDING MEDIUM FOR REPRODUCING SOUNDS RECORDED THEREON, ERASING MEANS BETWEEN SAID PLAYBACK AND RECORDING MEANS FOR ERASING THE SOUNDS RECORDED ON SAID MEDIUM, MEANS FOR CONTINUOUSLY DRIVING THE RECORDING MEDIUM PAST SAID RECORDING MEANS, PLAYBACK MEANS, AND ERASE MEANS; MEANS MOUNTING SAID PLAYBACK MEANS AT A POSITION SPACED FROM SAID RECORDING MEANS A DISTANCE ALONG THE DIRECTION OF TRAVEL OF SAID MEDIUM EQUAL TO A MAJOR PORTION OF THE LENGTH THEREOF, AND MEANS FOR SIMULTANEOUSLY ENERGIZING SAID RECORDING MEANS, PLAYBACK MEANS, ERASING MEANS AND DRIVE MEANS WHEREBY SOUND IS RECORDED, AND PLAYED BACK ONLY AFTER THE RECORDING MEDIUM HAS TRAVELLED OVER A MAJOR PORTION OF ITS LENGTH, AND THEN ERASED.
References Cited (Backward Citations)
GB771104A
Cited
US2876561A
Cited
US3059348A
Cited
US3155778A
Cited
US3200516A
Cited
US3156052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |