Machines not elsewhere specified – Agricultural or construction machinery – Drilling – mining – or soil treatment
Patent
1980-03-12
1982-11-02
Tung, T.
Machines not elsewhere specified
Agricultural or construction machinery
Drilling, mining, or soil treatment
D15 22, D1504
Patent
active
D02667657
REFERENCES:
patent: 2874793 (1959-02-01), Wagner
patent: 3006427 (1961-10-01), Van Der Lely
patent: 3266179 (1966-08-01), Golden
patent: 3533311 (1970-10-01), Allds et al.
patent: 3750762 (1973-08-01), Eaton
patent: 3754341 (1973-08-01), Caldwell et al.
patent: 3788415 (1974-01-01), Tilley
patent: 3834049 (1974-09-01), Bond
patent: 3911602 (1975-10-01), Trevathan
"Model 1500 Trencher", The Charles Machine Works, Inc. May 1978.
"Davis Trimline 120", J. I. Case, 1977.
Bulletin T2/320, "Arps Model 2000 Trench Devil", Arps Corp.
"Ditch Witch C & M", Charles Machine Works, Inc.
Midmark Corporation
Tung T.
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