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Household
Class Information
Number:
348/85
Name:
Television
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Special applications
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Hazardous or inaccessible
> Borehole
Description:
Subject matter wherein the inaccessible environment is a hole drilled in the earth (e.g., an exploratory well).
Patents under this class:
1
2
Patent Number
Title Of Patent
Date Issued
3984627
Method and apparatus for examining the interior of a bore hole and/or caisson or the like
Oct. 5, 1976
3974330
Miniature underwater bore hole inspection apparatus
Aug. 10, 1976
1
2
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