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:
Jul. 07, 1992
Filed:
Dec. 15, 1989
Kazuo Yamaguchi, Tokyo, JP;
Nihon Kohden Corporation, Tokyo, JP;
Abstract
An apparatus for non-invasively measuring the concentratiuon of a predetermined substance in blood. Light of first and second wavelengths is emitted through a pulsating living tissue, either alternately of simultaneously. The amounts of light of the first and second wavelengths transmitted through the pulsating living tissue are measured for first and second different thicknesses of the pulsating tissue. A calculation is then carried out to determine the concentration of the predetermined substance based on the detected amounts of light of the first and second wavelengths when the pulsating living tissue has the first thickness, the amounts of light of the first and second wavelengths detected when the pulsating living tissue has the second thickness, and absorption coefficients of the substance and absorption coefficients of water at the first and second wavelengths.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile