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2172545
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Information
Patent Grant
2172545
References
Source
Patent Number
2,172,545
Date Filed
Not available
Date Issued
Tuesday, September 12, 1939
85 years ago
CPC
B23F21/284 - in exchangeable arrangement
Y10T74/19963 - Spur
US Classifications
076 - Metal tools and implements, making
074 - Machine element or mechanism
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