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Industry
CPC
E21C25/40
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Parent Industries
E
FIXED CONSTRUCTIONS
E21
Mining
E21C
MINING OR QUARRYING
E21C25/00
Cutting machines
Current Industry
E21C25/40
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Patents Grants
last 30 patents
Information
Patent Grant
Cutter assembly with freewheeling cutting elements
Patent number
10,352,163
Issue date
Jul 16, 2019
LeRoy G. Hagenbuch
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Chain for trencher apparatus
Patent number
6,014,826
Issue date
Jan 18, 2000
Craig B. Walgren
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
2048702
Patent number
2,048,702
Issue date
Jul 28, 1936
E21 - EARTH DRILLING MINING
Information
Patent Grant
1841268
Patent number
1,841,268
Issue date
Jan 12, 1932
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
CUTTER ASSEMBLY WITH FREEWHEELING CUTTING ELEMENTS
Publication number
20170016322
Publication date
Jan 19, 2017
LeRoy G. Hagenbuch
E21 - EARTH DRILLING MINING