US3452164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone receiver with band elimination characteristic
Assignee: NEC Corp
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Filing: 1966-06-28
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Granted: 1969-06-24
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Expires: 1986-06-28
Abstract
No abstract record available.
Inventors
- 👤 Kiyoshi Kobara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:04
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/225; H03; H03H; H03H1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A TELEPHONE RECEIVER HAVING AT LEAST ONE ATTENUATION POLE AT A PREDETERMINED FREQUENCY COMPRISING: A VESSEL OF INSULATING MATERIAL; A DIAPHRAGM DISPOSED ACROSS THE MOUTH OF SAID VESSEL; MEANS IN SAID VESSEL FOR OSCILLATING SAID DIAPHRAGM IN RESPONSE TO A SUPPLIED SIGNAL; FIRST PLATE MEANS DISPOSED INTERNALLY OF SIAD DIAPHRAGM AND CONSTITUTING THEREWITH A FIRST CAVITY; AND SECOND PLATE MEANS DISPOSED INTERNALLY OF SAID FIRST PLATE MEANS AND CONSTITUTING THEREWITH A SECOND CAVITY AND WITH SAID VESSEL A THIRD CAVITY; EACH OF SAID FIRST AND SECOND PLATE MEANS INCLUDNG APERTURES FOR RESPECTIVELY COUPLING SAID FIRST AND SAID SECOND CAVITIES AND SAID SECOND AND SAID THIRD CAVITIES.
Claim 2
Dependent Claim
106 words
A TELEPHONE RECEIVER HAVING AT LEAST ONE ATTENUATION POLE AT A PREDETERMINED FREQUENCY COMPRISING: A VESSEL OF INSULATING MATERIAL; A DIAPHRAGM DISPOSED ACROSS THE MOUTH OF SAID VESSEL; MEANS IN SAID VESSEL FOR OSCILLATING SAID DIAPHRAGM IN RESPONSE TO A SUPPLIED SIGNAL; FIRST PLATE MEANS DISPOSED INTERNALLY OF SIAD DIAPHRAGM AND CONSTITUTING THEREWITH A FIRST CAVITY; AND SECOND PLATE MEANS DISPOSED INTERNALLY OF SAID FIRST PLATE MEANS AND CONSTITUTING THEREWITH A SECOND CAVITY AND WITH SAID VESSEL A THIRD CAVITY; EACH OF SAID FIRST AND SECOND PLATE MEANS INCLUDNG APERTURES FOR RESPECTIVELY COUPLING SAID FIRST AND SAID SECOND CAVITIES AND SAID SECOND AND SAID THIRD CAVITIES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |