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:
Dec. 31, 2002
Filed:
Oct. 18, 2000
Applicant:
Inventors:
Dennis G. Douglas, Bend, OR (US);
Phillip C. Ohl, Keppenick, WA (US);
Alan A. Burns, Portola Valley, CA (US);
Assignee:
Vista Research, Inc., Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L 9/10 ; G01L 9/14 ;
U.S. Cl.
CPC ...
G01L 9/10 ; G01L 9/14 ;
Abstract
A method and an apparatus for measuring the pressure or other physical quantities of a gas or a liquid in a sealed container without penetrating the container. Two permanent magnets, one located on a sensing unit inside the container and one located on a readout unit located outside the container are used to communicate the magnitude of the pressure sensed inside the container to the readout unit. No power supply is required to implement this system.