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US3606882A
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US
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Eog processing system for p-and qrswave characteristics
Assignee: Hitachi Ltd
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Filing: 1969-04-11
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Granted: 1971-09-21
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Expires: 1989-04-11
Abstract
Abstract A SYSTEM FOR DIAGNOSING HEART DISEASES EMPLOYS ANALOG AND DIGITAL CIRCUITRY WHICH SEPARATES THE P WAVE OR THE QRS WAVE FROM A WAVEFORM OF CARDIAC POTENTIAL. THIS WAVEFORM OF CARDIAC POTENTIAL INCLUDES THE P WAVE, THE QRS WAVE AND THE T WAVE. THROUGH A PLURALITY OF STORAGE AND SAMPLING ELEMENTS, THE WIDTH AND AMPLITUDE OF THE QRS WAVE OR THE WIDTH NUMBER OF PEAKS AND CHARACTERISTICS OF THE P WAVE ARE DETERMINED.
Inventors
- 👤 Zenmon Abe
- 👤 Masayuki Tsuneoka
- 👤 Eiichi Kimura
- 👤 Gengo Kasai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:23
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/346; A61B5/349; A61B5/353; A61B5/72; A61B5/7235; A61B5/7239
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |