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Tools & Hardware
Class Information
Number:
173/222
Name:
Tool driving or impacting
>
Means to drive tool about an axis
>
Fluid motor
> Plural motors
Description:
Apparatus having more than one motor.
Patents under this class:
Patent Number
Title Of Patent
Date Issued
6698532
Piercing apparatus
Mar. 2, 2004
6601655
Piercing apparatus
Aug. 5, 2003
5924498
Pressure converter III
Jul. 20, 1999
5617924
Arrangement for tightening screw connections
Apr. 8, 1997
5524713
Drill rig having alternate spindle drive
Jun. 11, 1996
5437338
Hydraulic drive unit for driving a drilling tool
Aug. 1, 1995
4719978
Earth drilling device
Jan. 19, 1988
4221269
Pipe spinner
Sep. 9, 1980
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