USD318296SExpiredUtility

Chalk eraser cleaner

6
Individually held — no corporate assignee on recordPriority: Mar 17, 1988Filed: Mar 17, 1988Granted: Jul 16, 1991
Est. expiryMar 17, 2008(expired)· nominal 20-yr term from priority
Inventors:Carl R. Zechner
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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 chalk eraser cleaner, as shown and described.

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