The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 1992
Filed:
Jul. 12, 1991
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61M / ; A61B / ;
U.S. Cl.
CPC ...
128687 ; 128716 ; 600 26 ;
Abstract
A system for discriminating sleep state of human body provides variation indexes representing variation of the biological signal on the basis of first variation amount denoting a tendency of increment in time series of measured biological signal from the starting time of the measurement and second variation amount denoting the temporal variation of the biological signal, and discriminates different sleep state on the basis of distribution density of the variation indexes exceeding a predetermined threshold, whereby NREM and REM sleep periods in particular can be reliably discriminated, to be sufficiently contributive to a transmission of sleep information that ensures a comfortable awakening.