Title: |
1892 Ad-John L. Bogert, Improved Arbor Driving Block |
Source: |
The Age of Steel, V71, 09 Jan., 1892, pg. 8 |
Insert Date: |
3/5/2025 10:56:24 PM |
US Patent: 369,947
https://www.datamp.org/patents/displayPatent.php?number=369947&typeCode=0 |
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1892 John L. Bogert, Improved Arbor Driving Block
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