Inventor
GREENLEE JOSEPH G
US12 patents
Patents
12 patentsUS10724347B2Jul 28, 2020
Virtual brake system
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USD851132SJun 11, 2019
Horizontal directional drill
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US11686180B2Jun 27, 2023
Virtual brake system
CHARLES MACHINE WORKS2 citations70
US11208851B2Dec 28, 2021
Dual pipe drill head quick interchange joint
CHARLES MACHINE WORKS2 citations70
US11118430B2Sep 14, 2021
Virtual brake system
CHARLES MACHINE WORKS2 citations70
US11828176B2Nov 28, 2023
Dual-member pipe assembly
CHARLES MACHINE WORKS0 citations61
US11002076B2May 11, 2021
Dual-member pipe assembly
CHARLES MACHINE WORKS0 citations61
US12286843B2Apr 29, 2025
Dual pipe drill head quick interchange joint
CHARLES MACHINE WORKS0 citations60
US11578540B2Feb 14, 2023
Dual pipe drill head quick interchange joint
CHARLES MACHINE WORKS0 citations60
US12116855B2Oct 15, 2024
Virtual brake system
CHARLES MACHINE WORKS0 citations59
US10260287B2Apr 16, 2019
Dual-member pipe assembly
CHARLES MACHINE WORKS0 citations51
US11885223B2Jan 30, 2024
Method to prevent dual rod drill string drag
CHARLES MACHINE WORKS0 citations44