US3280817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable memory
Assignee: —
•
Filing: —
•
Granted: 1966-10-25
•
Expires: 1983-10-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:11
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/346; A61B5/349; A61B5/352; A61B7/00; A61B7/02; A61B7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE METHOD OF EVALUATING HEART SOUND COMPRISING: GENERATING AN ELECTRICAL SIGNAL DERIVED FROM HEART SOUND GENERATED THROUGH A PLURALITY OF SUCCESSIVE HEART CYCLES, GENERATING A KEYING SIGNAL IN SUBSTANTIALLY UNIFORM PHASE RELATION WITH THE FIRST HEART SOUND OF EACH CYCLE, GENERATING TIMING PULSES IN DEPENEDENCY ON THE KEYING SIGNALS HAVING A DURATION WHICH IS LESS THAN THAT OF SAID HEART CYCLE. VARYING THE DURATION OF THE TIMING PULSES RESPONSIVELY TO CHANGES IN DURATION OF THE HEART CYCLE, ELECTRICALLY MEASURING THE ELECTRICAL HEART SOUND SIGNAL DURING EACH TIMING PULSE TO PRODUCE A RESULTANT SIGNAL, AND GENERATING A DISTINCTIVE OUTPUT SIGNAL ONLY WHEN THE RESULTANT SIGNAL DEVIATES FROM A SELECTED RANGE.
Claim 2
Independent Claim
109 words
THE METHOD OF EVALUATING HEART SOUND COMPRISING: GENERATING AN ELECTRICAL SIGNAL DERIVED FROM HEART SOUND GENERATED THROUGH A PLURALITY OF SUCCESSIVE HEART CYCLES, GENERATING A KEYING SIGNAL IN SUBSTANTIALLY UNIFORM PHASE RELATION WITH THE FIRST HEART SOUND OF EACH CYCLE, GENERATING TIMING PULSES IN DEPENEDENCY ON THE KEYING SIGNALS HAVING A DURATION WHICH IS LESS THAN THAT OF SAID HEART CYCLE. VARYING THE DURATION OF THE TIMING PULSES RESPONSIVELY TO CHANGES IN DURATION OF THE HEART CYCLE, ELECTRICALLY MEASURING THE ELECTRICAL HEART SOUND SIGNAL DURING EACH TIMING PULSE TO PRODUCE A RESULTANT SIGNAL, AND GENERATING A DISTINCTIVE OUTPUT SIGNAL ONLY WHEN THE RESULTANT SIGNAL DEVIATES FROM A SELECTED RANGE.
References Cited (Backward Citations)
US3123768A
Cited
US2756741A
Cited
US3140710A
Cited
US3129704A
Cited
US3101082A
Cited
US3144018A
Cited
US3132208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |