USD427631SExpiredUtility

Perpetual calendar

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Assignee: PAAL FRANKPriority: Oct 1, 1999Filed: Oct 1, 1999Granted: Jul 4, 2000
Est. expiryOct 1, 2019(expired)· nominal 20-yr term from priority
Inventors:Frank Paal
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PatentIndex Score
1
Cited by
5
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a perpetual calendar, as shown.

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