Patent US3155778A successfully refreshed from Google Patents.
US3155778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Teaching apparatus using sound recording
Assignee: Individual
•
Filing: 1961-03-03
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Granted: 1964-11-03
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
- 👤 Edward M Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:28
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IMMEDIATE PLAYBACK SOUND RECORDING AND REPRODUCING APPARATUS COMPRISING SPACED-APART RECORDING AND REPRODUCING HEADS, A LENGTHY FLEXIBLE RECORDING MEDIUM EXTENDING PAST BOTH SAID HEADS, A SINGLE DRIVE CAPSTAN, MEANS ENGAGEABLE WITH SAID MEDUIM AT A FIRST POINT BETWEEN SAID HEADS FOR URGING SAID MEDIUM AGAINST SAID CAPSTAN AND THEREBY FEEDING THE MEDIUM PAST SAID RECORDING HEAD AND INTO A FREE LOOP BETWEEN SAID HEADS, AND MEANS ENGAGEABLE WITH SAID MEDIUM AT A POINT FOLLOWING SAID REPRODUCING HEAD FOR URGING SAID MEDIUM AGAINST SAID CAPSTAN AND THEREBY FEEDING SAID MEDIUM PAST SAID REPRODUCING HEAD.
Claim 2
Dependent Claim
92 words
IMMEDIATE PLAYBACK SOUND RECORDING AND REPRODUCING APPARATUS COMPRISING SPACED-APART RECORDING AND REPRODUCING HEADS, A LENGTHY FLEXIBLE RECORDING MEDIUM EXTENDING PAST BOTH SAID HEADS, A SINGLE DRIVE CAPSTAN, MEANS ENGAGEABLE WITH SAID MEDUIM AT A FIRST POINT BETWEEN SAID HEADS FOR URGING SAID MEDIUM AGAINST SAID CAPSTAN AND THEREBY FEEDING THE MEDIUM PAST SAID RECORDING HEAD AND INTO A FREE LOOP BETWEEN SAID HEADS, AND MEANS ENGAGEABLE WITH SAID MEDIUM AT A POINT FOLLOWING SAID REPRODUCING HEAD FOR URGING SAID MEDIUM AGAINST SAID CAPSTAN AND THEREBY FEEDING SAID MEDIUM PAST SAID REPRODUCING HEAD.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |