US3267591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio teaching aid
Assignee: GEN ELECTRONIC LAB Inc
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Filing: 1964-08-25
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Granted: 1966-08-23
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Expires: 1984-08-25
Abstract
No abstract record available.
Inventors
- 👤 William N Locke
- 👤 Lewis S Billig
- 👤 Bisberg Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:46
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/08; G09B5/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
137 words
IN AN AUDIO TEACHING AID SYSTEM, THE COMBINATION OF A PLURALITY OF STUDENT POSITIONS; PLAYBACK EQUIPMENTS GROUPED TOGETHER IN REMOTE RELATION TO SAID STUDENT POSITIONS; AND A CONTROL CONSOLE REMOTE TO BOTH THE STUDENT POSITIONS AND PLAYBACK EQUIPMENTS; A PLURALITY OF SWITCHING MEANS IN THE CONTROL CONSOLE INCLUDING A STUDENT SELECTOR SWITCH FOR EACH OF THE STUDENT POSITIONS AND A MASTER SELECTOR SWITCH, EACH OF SAID STUDENT SELECTOR SWITCHES AND SAID MASTER SELECTOR SWITCH HAVING A PLURALITY OF SELECTOR TERMINALS ONE SELECTOR TERMINAL OF EACH SWITCH COUPLED TO A CORRESPONDING PLAYBACK EQUIPMENT AND ONE OF THE SELECTOR TERMINALS ON EACH STUDENT SELECTOR SWITCH COUPLED TO THE MASTER SELECTOR SWITCH THEREBY PROVIDING IN EACH STUDENT SELECTOR SWITCH A CAPACITY FOR SELECTIVELY COUPLING EACH INDIVIDUAL STUDENT POSITION TO A SELECTED PLAYBACK EQUIPMENT AND ALTERNATIVELY TO THE MASTER SELECTOR SWITCH.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |