Patent US3348535A successfully refreshed from Google Patents.
US3348535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parturitive phone
Assignee: Individual
•
Filing: 1964-12-04
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Granted: 1967-10-24
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Expires: 1984-12-04
Abstract
No abstract record available.
Inventors
- 👤 Gregg David Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:37
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/43; A61B5/4306; A61B5/4343; A61B5/4362; A61B5/02; A61B5/024; A61B5/02411; A61B7/00; A61B7/02; A61B7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
APPARATUS FOR DETECTING FETAL HEART BEATS DURING PARTURITION, INCLUDING: FIRST ELECTRO-ACOUSTICAL TRANSDUCER MEANS FOR SENSING A MOTHER''S HEART BEAT AND THE FETAL HEART BEAT AND FOR PRODUCING RESPECTIVE FIRST AND SECOND ELECTRICAL SIGNALS IN RESPONSE THERETO EACH WITH PARTICULAR AMPLITUDE; SECOND ELECTRO/ACOUSTICAL TRANSDUCER MEANS FOR SENSING THE MOTHER''S HEART BEAT TO THE SUBSTANTIAL EXCLUSION OF THE FETAL HEART BEAT AND FOR PRODUCING A THIRD SIGNAL IN RESPONSE TO THE MOTHER''S HEART BEAT WITH A PARTICULAR AMPLITUDE; CIRCUIT MEANS COUPLED TO SAID FIRST AND SECOND TRANSDUCER MEANS AND RESPONSIVE TO SAID ELECTRICAL SIGNALS FROM SAID FIRST AND SECOND TRANSDUCER MEANS FOR SUBSTANTIALLY NULLING OUT SAID FIRST AND THIRD ELECTRICAL SIGNALS AND FOR PASSING SAID SECOND ELECTRICAL SIGNAL; AND REPRODUCING MEANS COUPLED TO SAID CIRCUIT MEANS FOR REPRODUCING SAID SECOND ELECTRICAL SIGNAL.
Claim 2
Dependent Claim
130 words
APPARATUS FOR DETECTING FETAL HEART BEATS DURING PARTURITION, INCLUDING: FIRST ELECTRO-ACOUSTICAL TRANSDUCER MEANS FOR SENSING A MOTHER''S HEART BEAT AND THE FETAL HEART BEAT AND FOR PRODUCING RESPECTIVE FIRST AND SECOND ELECTRICAL SIGNALS IN RESPONSE THERETO EACH WITH PARTICULAR AMPLITUDE; SECOND ELECTRO/ACOUSTICAL TRANSDUCER MEANS FOR SENSING THE MOTHER''S HEART BEAT TO THE SUBSTANTIAL EXCLUSION OF THE FETAL HEART BEAT AND FOR PRODUCING A THIRD SIGNAL IN RESPONSE TO THE MOTHER''S HEART BEAT WITH A PARTICULAR AMPLITUDE; CIRCUIT MEANS COUPLED TO SAID FIRST AND SECOND TRANSDUCER MEANS AND RESPONSIVE TO SAID ELECTRICAL SIGNALS FROM SAID FIRST AND SECOND TRANSDUCER MEANS FOR SUBSTANTIALLY NULLING OUT SAID FIRST AND THIRD ELECTRICAL SIGNALS AND FOR PASSING SAID SECOND ELECTRICAL SIGNAL; AND REPRODUCING MEANS COUPLED TO SAID CIRCUIT MEANS FOR REPRODUCING SAID SECOND ELECTRICAL SIGNAL.
References Cited (Backward Citations)
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US2658505A
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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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |