USD336924SExpiredUtility

Signal indicator for educational use

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Individually held — no corporate assignee on recordPriority: Apr 10, 1991Filed: Apr 10, 1991Granted: Jun 29, 1993
Est. expiryApr 10, 2011(expired)· nominal 20-yr term from priority
Inventors:Margaret M. HeiserSandra J. Terrell
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PatentIndex Score
0
Cited by
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References
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Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a signal indicator for educational use, as shown.

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