Title: |
1921 Ad-Kremer-Cummins Machine Co., Drill Press Speed Changer |
Source: |
Hitchcock's Machine Tool List, Jan. 1921, pg. 85 |
Insert Date: |
2/10/2023 1:19:05 PM |
US Patent: 1,517,078
https://datamp.org/patents/displayPatent.php?number=1517078&typeCode=0 |
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1921 Kremer-Cummins Machine Co., Drill Press Speed Changer
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