USD297847SExpiredUtility

Heavy wall drill pipe

61
Assignee: LOR INCPriority: Apr 20, 1984Filed: Apr 20, 1984Granted: Sep 27, 1988
Est. expiryApr 20, 2004(expired)· nominal 20-yr term from priority
Inventors:Gregg S. PerkinAlonzo L. DecellPeter Patarini
61
PatentIndex Score
8
Cited by
11
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for heavy wall drill pipe, as shown and described.

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