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2638948
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Information
Patent Grant
2638948
References
Source
Patent Number
2,638,948
Date Filed
Not available
Date Issued
Tuesday, May 19, 1953
71 years ago
CPC
E01B31/24 - Forming, treating, reconditioning, or cleaning holes in sleepers Drilling-templates
B23B51/0045 - by expanding or tilting the toolhead
Y10T82/125 - Tool simultaneously moving axially
US Classifications
082 - Turning
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