US PATENT SUBCLASS 367 / 27
.~.~ Time interval measurement

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


367 /   HD   COMMUNICATIONS, ELECTRICAL: ACOUSTIC WAVE SYSTEMS AND DEVICES

14  DF  SEISMIC PROSPECTING {4}
25  DF  .~ Well logging {6}
27.~.~ Time interval measurement

DEFINITION

Classification: 367/27

Time interval measurement:

(under subclass 25) Subject matter wherein the time interval between the transmission and detection of an acoustic wave is used to determine some characteristic of the acoustic medium (i.e., earth).