US PATENT SUBCLASS 342 / 22
TRANSMISSION THROUGH MEDIA OTHER THAN AIR OR FREE SPACE

Current as of: June, 1999
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342 /   HD   COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)

22TRANSMISSION THROUGH MEDIA OTHER THAN AIR OR FREE SPACE

DEFINITION

Classification: 342/22

TRANSMISSION THROUGH MEDIA OTHER THAN AIR OR FREE SPACE:

(under the class definition) Subject matter wherein a radar signal is sent through a substance other than air or free space.

SEE OR SEARCH CLASS

324, Electricity: Measuring and Testing,

323+, for electrical wave subsurface geophysical exploration.

455, Telecommunications,

40, for transmission of modulated carrier wave signals through the medium of earth or water, per se.