Mine roof support plate

Details Mine roof support plate Mine roof support plate

1985-11-13

1989-06-20

Bullock, B. J.

Tools and hardware

Fastener, support or mount not elsewhere specified

Fastener or coupling

D 8353

Patent

active

D03016870

REFERENCES:
patent: D236428 (1975-08-01), Stewart et al.
patent: 2854824 (1958-10-01), Curry et al.
patent: 4095431 (1978-06-01), Hannan
patent: 4112693 (1978-09-01), Collin et al.
patent: 4371293 (1983-02-01), Wilcox et al.
patent: 4476660 (1984-10-01), Francovitch
patent: 4518282 (1985-05-01), Wilcox et al.
Brochure entitled: "Keeping the Roof Over Your Head", published by Keystone Bolt Company, Copyright 1979.
Brochure entitled: "Tazewell Underground Roof Control Products and Services", published by Tazewell Industries (undated).

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