USD471235SExpiredUtility

Mathematical instructional aide device

16
Assignee: EVAN MCKENNA FOUNDATIONPriority: Jun 21, 2001Filed: Jun 21, 2001Granted: Mar 4, 2003
Est. expiryJun 21, 2021(expired)· nominal 20-yr term from priority
Inventors:Kay Perkins Emerson
16
PatentIndex Score
3
Cited by
5
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for mathematical instructional aide device, as shown and described.

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