USD252702SExpiredUtility

Subterranean water drain

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Assignee: POLYPHASE CORPPriority: Mar 14, 1977Filed: Mar 14, 1977Granted: Aug 21, 1979
Est. expiryMar 14, 1997(expired)· nominal 20-yr term from priority
Inventors:John Anderson Armistead
27
PatentIndex Score
1
Cited by
2
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a subterranean water drain, as shown.

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