USD252212SExpiredUtility

Perpetual calendar

43
Individually held — no corporate assignee on recordPriority: Sep 24, 1976Filed: Sep 24, 1976Granted: Jun 26, 1979
Est. expirySep 24, 1996(expired)· nominal 20-yr term from priority
Inventors:Henry S. Harrison
43
PatentIndex Score
5
Cited by
2
References
1
Claims

Claims

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

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