USD316214SExpiredUtility

Piston ring compressor

73
Assignee: O'DONNELL PATRICK JPriority: May 13, 1987Filed: May 13, 1987Granted: Apr 16, 1991
Est. expiryMay 13, 2007(expired)· nominal 20-yr term from priority
Inventors:Patrick J. O'Donnell
73
PatentIndex Score
16
Cited by
14
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a piston ring compressor, as shown and described.

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