USD252033SExpiredUtility
Math teaching board
Individually held — no corporate assignee on recordPriority: Jun 17, 1977Filed: Jun 17, 1977Granted: Jun 5, 1979
Est. expiryJun 17, 1997(expired)· nominal 20-yr term from priority
Inventors:Lawrence Restaino
34
PatentIndex Score
2
Cited by
5
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a math teaching board, as shown and described.
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