USD253709SExpiredUtility
Apparatus for indicating numerical concepts
Est. expiryOct 14, 1997(expired)· nominal 20-yr term from priority
Inventors:Masami Shiraishi
41
PatentIndex Score
2
Cited by
2
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for an apparatus for indicating numerical concepts, as shown and described.
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