USD301687SExpiredUtility

Mine roof support plate

63
Individually held — no corporate assignee on recordPriority: Nov 13, 1985Filed: Nov 13, 1985Granted: Jun 20, 1989
Est. expiryNov 13, 2005(expired)· nominal 20-yr term from priority
Inventors:Bruce A. CassidyJames O. Gray
63
PatentIndex Score
16
Cited by
8
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a mine roof support plate, substantially as shown and described.

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