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Manufactured By:
Cogsdill Mfg. Co./Cogsdill Twist Drill Co.
Detroit, MI; Lugoff, SC

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Details
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

Image Description:
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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Image 1
1921 Cogsdill Mfg. Co., Center Drill & Reamer
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