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4705107
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Patent Grant
4705107
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Source
Patent Number
4,705,107
Date Filed
Not available
Date Issued
Tuesday, November 10, 1987
37 years ago
CPC
F28G3/10 - having scrapers, hammers, or cutters
B08B9/045 - the cleaning devices being rotated while moved
E21B37/02 - Scrapers specially adapted therefor
E21B41/0078 - Nozzles used in boreholes
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