USD455826SExpiredUtility

Filter Apparatus

Assignee: DONALDSON CO INCPriority: Dec 1, 1999Filed: Dec 1, 1999Granted: Apr 16, 2002

Est. expiryDec 1, 2019(expired)· nominal 20-yr term from priority

PatentIndex Score

108

Cited by

References

Claims

exact text as granted — not AI-modified

The ornamental design for filter apparatus, as shown and described.

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