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AT119296B
Expired / Lapsed
AT
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Method and apparatus for removing drilling debris from cased boreholes.
Assignee: Akt Ges Fuer Tiefbohrtechnik U
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Filing: 1928-01-26
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Granted: 1930-10-10
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Expires: 1948-01-26
Abstract
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AT
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2026-10-25 10:37
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