USD246033SExpiredUtility
Teaching protractor
Individually held — no corporate assignee on recordPriority: Nov 24, 1975Filed: Nov 24, 1975Granted: Oct 11, 1977
Est. expiryNov 24, 1995(expired)· nominal 20-yr term from priority
Inventors:Dale E. King
24
PatentIndex Score
3
Cited by
6
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a teaching protractor, as substantially shown.
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