US3213207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereophonic phonograph transducer
Assignee: US Philips Corp
•
Filing: 1959-03-04
•
Granted: 1965-10-19
•
Expires: 1979-03-04
Abstract
No abstract record available.
Inventors
- 👤 Munk Enno Coert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:33
CPC Classifications
H; H04; H04R; H04R17/00; H04R17/04; H04R17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A TRANSDUCER FOR SELECTIVELY RECORDING AND REPRODUCING OSCILLATIONS CORRESPONDING TO VARIATIONS IN TWO DIFFERENT DIRECTIONS IN A GROOVE COMPRISING A MEMBER ADAPTED TO OSCILLATE IN SAID GROOVE IN ACCORDANCE WITH SAID VARIATIONS, AND AN ELEMENT FOR SELECTIVELY CONVERTING THE OSCILLATIONS INTO TWO SEPARATE ELECTRICAL SIGNALS EACH CORRESPONDING TO ONE OF THE DIRECTIONS OF OSCILLATION AND FOR CONVERTING A COMPOSITE SIGNAL INTO TWO OSCILLATIONS EACH HAVING A DIFFERENT DIRECTION, SAID ELEMENT COMPRISING AT LEAST TWO TUBULAR BODIES OF CERAMIC PIEZOELECTRIC MATERIAL MECHANICALLY JOINED TOGETHER IN AN AXIAL DIREC-
Claim 2
Dependent Claim
87 words
A TRANSDUCER FOR SELECTIVELY RECORDING AND REPRODUCING OSCILLATIONS CORRESPONDING TO VARIATIONS IN TWO DIFFERENT DIRECTIONS IN A GROOVE COMPRISING A MEMBER ADAPTED TO OSCILLATE IN SAID GROOVE IN ACCORDANCE WITH SAID VARIATIONS, AND AN ELEMENT FOR SELECTIVELY CONVERTING THE OSCILLATIONS INTO TWO SEPARATE ELECTRICAL SIGNALS EACH CORRESPONDING TO ONE OF THE DIRECTIONS OF OSCILLATION AND FOR CONVERTING A COMPOSITE SIGNAL INTO TWO OSCILLATIONS EACH HAVING A DIFFERENT DIRECTION, SAID ELEMENT COMPRISING AT LEAST TWO TUBULAR BODIES OF CERAMIC PIEZOELECTRIC MATERIAL MECHANICALLY JOINED TOGETHER IN AN AXIAL DIREC-
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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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |