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Patent US3552036A successfully refreshed from Google Patents.
US3552036A
Expired / Lapsed
US
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Ecg and blood pressure signals simulator
Assignee: Spectramed Inc
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Filing: 1968-11-01
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Granted: 1971-01-05
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Expires: 1988-11-01
Abstract
Abstract PULSE GENERATING AND SHAPING CIRCUITS GENERATE A COMOSITE OUTPUT SIGNAL SIMULATING AN ECG SIGNAL FOR DISPLAY ON CATHODE-RAY PRESENTATION EQUIPMENT. THE CIRCUITS ARE SELECTIVELY CONTROLLABLE TO PROVIDE THE QRS, P AND T WAVES OF INDIVIDUALLY PRESCRIBED AMPLITUDES AND VARIABLE RELATIVE LOCATIONS ALONG THE X-AXIS. THE QRS WAVE MAY BE MADE TO EXTEND EITHER POSITIVELY IN THE Y DIRECTION, OR INVERTED TO EXTEND NEGATIVELY. A FURTHER ASPECT IS THE PROVISION OF ADDITIONAL PULSE SIGNAL GENERATING CIRCUITRY FOR PRODUCING A PULSE TRAIN REPRESENTTIVE OF BLOOD PRESSURE AS MEASURED WITHIN THE AORTA.
Inventors
- 👤 Leo M Mahler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:21
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/28; G06; G06G; G06G7/00; G06G7/48; G06G7/60
Claims Analysis
Total Claims: 0
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |