Excavating – Processes
Patent
1988-09-02
1990-03-06
Burr, Edgar S.
Excavating
Processes
37141R, E02F 100
Patent
active
049053868
ABSTRACT:
A cutting edge member for fitting onto an excavation apparatus wherein the cutting edge member is of softer material than iron for digging around pipelines.
REFERENCES:
patent: 3082692 (1962-04-01), Brock
patent: 4360980 (1982-11-01), Jarvis
patent: 4550512 (1985-11-01), Felstet
patent: 4571861 (1986-02-01), Klever et al.
Burr Edgar S.
Cohen Moshe I.
The Dow Chemical Company
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