USD309024SExpiredUtility

Observation monitoring well manhole cover

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Assignee: UNIVERSAL VALVE COMPANY INCPriority: Mar 1, 1988Filed: Mar 1, 1988Granted: Jul 3, 1990
Est. expiryMar 1, 2008(expired)· nominal 20-yr term from priority
Inventors:Martin C. Pettesch
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PatentIndex Score
0
Cited by
4
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for an observation monitoring well manhole cover, as shown and described.

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