Title: |
1921 Ad-Thomas Elevator Co., Barker Wrenchless Chuck |
Source: |
Hitchcock's Machine Tool List, Jan 1921, pg. 111 |
Insert Date: |
2/28/2023 10:35:30 AM |
US Patent: 1,249,300
https://datamp.org/patents/displayPatent.php?number=1249300&typeCode=0 |
|
1921 Thomas Elevator Co., Barker Wrenchless Chuck
|
|