USD312881SExpiredUtility
Interlocking paving block
Individually held — no corporate assignee on recordPriority: Feb 22, 1989Filed: Feb 22, 1989Granted: Dec 11, 1990
Est. expiryFeb 22, 2009(expired)· nominal 20-yr term from priority
Inventors:Friedrich S. Naether
69
PatentIndex Score
17
Cited by
8
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for the interlocking paving block, as shown and described.
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