US PATENT SUBCLASS 702 / 15
.~.~.~ Earthquake or volcanic activity

Current as of: June, 1999
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702 /   HD   DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING

1  DF  MEASUREMENT SYSTEM IN A SPECIFIC ENVIRONMENT {6}
2  DF  .~ Earth science {4}
14  DF  .~.~ Seismology {4}
15.~.~.~ Earthquake or volcanic activity

DEFINITION

Classification: 702/15

Earthquake or volcanic activity:

(under subclass 14) Subject matter including a seismic strong-motion recording means for monitoring or exploring shaking of the earth or a volcanic phenomenon.

SEE OR SEARCH CLASS

73, Measuring and Testing,

784, for measuring and testing of earth stress.