IPC Definitions - January 01, 2012
E21B 47/26 - Definition
Attention is drawn to the following places, which may be of interest for search:
Recording in connection with measuring in general | G01D |
Information storage in general | G11 |
Recording seismic data | G01V 1/24 |
Recording data of measuring magnetic field characteristic of the earth | G01V 3/36 |