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United States Patent 2525669
US Patent References:
Spindle-releasing device for drilling machines
- - 1701423


Inventors:
Marcel, Hainault
Publication Date:
10/10/1950
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Assignee:
Marcel, Hainault
Primary Class:
606/173
Other Classes:
408/140, 606/80, 408/703
International Classes:
A61B17/16
Foreign References:
FR12728A