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. 14, 1976
Filed:
Sep. 27, 1974
James E Heule, Minneapolis, MN (US);
Audronics, Inc., Minneapolis, MN (US);
Abstract
An apparatus is disclosed which comprises a photoelectric probe for introducing light pulses into a measurement area and for producing a measurement signal representative of the light as modulated in the measurement area, such modulation including modulations characteristic of the circulatory system blood volume variations of the area. Demodulation circuitry is disclosed which demodulates the meaningful from the non-meaningful data of the measurement signal, and utilization devices responsive to various characteristics of the meaningful data are disclosed, which utilization devices include a pulse wave meter, pulse amplitude meter, pulse rate meter, and tissue perfusion meter.