US3621836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for measuring and recording the rate of slow brain waves
Assignee: Individual
•
Filing: 1970-04-06
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Granted: 1971-11-23
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Expires: 1990-04-06
Abstract
Abstract A METHOD OF AND AN APPARATUS FOR MEASURING AND RECORDING THE RATE OF SLOW BRAIN WAVES COMPRISING AT LEAST A PAIR OF ELECTRODES TO BE MOUNTED ON THE HEAD OF A PERSON TO BE EXAMINED, INTEGRATOR MEANS FOR INTEGRATING THE SLOW BRAIN WAVES AND ALL THE BRAIN WAVES RESPECTIVELY AS THEY ARE TAKEN OUT THROUGH SAID ELECTRODES, DIVIDER MEANS FOR CALCULATING THE RATIO OF THE OUTPUT OF ONE INTEGRATOR MEANS TO THE OUTPUT OF THE OTHER INTEGRATOR MEANS, AND A MECHANISM FOR RECORDING AND INDICATING THE RESULT OF CALCULATION IN CONFORMITY WITH THE OUTPUT OF SAID DIVIDER MEANS.
Inventors
- 👤 Kotaro Nagatomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:39
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/369; A61B5/384
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |