Machines not elsewhere specified – Agricultural or construction machinery – Drilling – mining – or soil treatment
Patent
1983-06-06
1986-01-28
Bullock, B. J.
Machines not elsewhere specified
Agricultural or construction machinery
Drilling, mining, or soil treatment
Patent
active
D02823683
REFERENCES:
patent: D244190 (1977-05-01), Swartz et al.
patent: D253535 (1979-11-01), Schmidt et al.
patent: 3887017 (1975-06-01), Frederick
patent: 4312413 (1982-01-01), Loftis
patent: 4371041 (1983-02-01), Becker et al.
Bullock B. J.
Gitlin Suzanne N.
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