Electricity: measuring and testing – Of geophysical surface or subsurface in situ – For small object detection or location
Reexamination Certificate
2011-08-02
2011-08-02
Patidar, Jay M (Department: 2858)
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
For small object detection or location
C175S045000
Reexamination Certificate
active
07990150
ABSTRACT:
In a system in which a transmitter is moved through the ground in a region, the system including a locating arrangement for tracking the position of and/or guiding the transmitter as the transmitter moves through the ground, a locating arrangement includes a configuration, forming part of the transmitter, for transmitting a locating signal at a current one of at least two locating frequencies and for transmitting a frequency designation identifying one of the frequencies of the locating signal. A locator receives the frequency designation and the locating signal for use in tracking the transmitter and a frequency tracking arrangement switches the locator between different ones of the locating frequencies, as the current locating frequency, based on said frequency designation. In one feature, the locating arrangement is configured for automatically switching between the frequencies based on the frequency designation.
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Brune Guenter W.
Mercer John E.
Merlin Technology Inc.
Patidar Jay M
Pritzkau Patent Group LLC
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