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:
Nov. 04, 1997
Filed:
Feb. 08, 1996
Applicant:
Inventor:
David M Korpi, Salinas, CA (US);
Assignee:
Sierra Instruments, Inc., Monterey, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
73-3 ;
Abstract
A method and apparatus for precise measurement and calibration of gas flow rates is described. The apparatus and method employ precision-bored cylinders adapted for operation with ultrasonic transducers under the control of computer subroutines for accomplishing the desired methods.