Title: |
1921 Ad-Cogsdill Mfg. Co., Center Drill & Reamer |
Source: |
Hitchcock's Machine Tool List, Jan 1921, pg. 114 |
Insert Date: |
3/2/2023 10:47:02 PM |
The Grinding Machine for grinding these tools:
US Patent: 1,323,452
https://www.datamp.org/patents/displayPatent.php?number=1323452&typeCode=0 |
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1921 Cogsdill Mfg. Co., Center Drill & Reamer
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