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1600492
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Information
Patent Grant
1600492
References
Source
Patent Number
1,600,492
Date Filed
Not available
Date Issued
Tuesday, September 21, 1926
98 years ago
CPC
E21B4/12 - Electrically operated hammers
US Classifications
310 - Electrical generator or motor structure
173 - Tool driving or impacting
175 - Boring or penetrating the earth
318 - Electricity: motive power systems
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