USD291071SExpiredUtility

Telephone line polarity tester

32
Individually held — no corporate assignee on recordPriority: Mar 28, 1985Filed: Mar 28, 1985Granted: Jul 28, 1987
Est. expiryMar 28, 2005(expired)· nominal 20-yr term from priority
Inventors:Randy J. Breil
32
PatentIndex Score
6
Cited by
8
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a telephone line polarity tester, as shown and described.

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