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:
Sep. 20, 1994
Filed:
Apr. 23, 1992
Applicant:
Inventor:
Richard G Caro, San Francisco County, CA (US);
Assignee:
Sirraya, Inc., San Francisco, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
128633 ; 128664 ; 128665 ; 356 39 ; 356 41 ;
Abstract
Disclosed is a method and apparatus for determining the presence and/or concentration of chemical species which absorb electromagnetic energy, dependent to a degree upon the chemical species and the wavelength of electromagnetic energy applied to matter including said species. The absorbed electromagnetic energy generates acoustic energy which is detected and analyzed to determine the presence and/or concentration of the chemical species in the matter.