Joseph G. Greenlee

6 Patents

• US122868432025

  Dual Pipe Drill Head Quick Interchange Joint

  The Charles Machine Works, Inc.

  0 cites
• US121168552024

  Virtual Brake System

  The Charles Machine Works, Inc.

  0 cites
• US118852232024

  Method to Prevent Dual Rod Drill String Drag

  The Charles Machine Works, Inc.

  0 cites
• US118281762023

  Dual-member Pipe Assembly

  The Charles Machine Works, Inc.

  0 cites
• US116861802023

  Virtual Brake System

  The Charles Machine Works, Inc.

  0 cites
• US115785402023

  Dual Pipe Drill Head Quick Interchange Joint

  The Charles Machine Works, Inc.

  0 cites