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:
Jan. 07, 2003
Filed:
Nov. 15, 2000
Applicant:
Inventors:
D. Alan Hanna, Boulder, CO (US);
Mark A. Norris, Boulder, CO (US);
Assignee:
Datex-Ohmeda, Inc., Madison, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/900 ;
U.S. Cl.
CPC ...
G06F 1/900 ;
Abstract
A pulse oximeter ( ) includes two or more light sources ( ) for transmitting optical signals through an appendage ( ) of patient. The sources ( ) are operated to transmit code division multiplexed (CDM) signals. That is, the sources ( ) are driven by drives ( ) in response to signals from a digital processing unit ( ) such that the sources ( ) are modulated using different code sequences. The code sequences are preferably non-periodic and may be orthogonal to one another. The use of such CDM signals provides certain advantages related to noise reduction.