USD343700SExpiredUtility

Spark arrestor apparatus

27
Assignee: NEW ENGLAND VENTILATION TECHPriority: May 4, 1992Filed: May 4, 1992Granted: Jan 25, 1994
Est. expiryMay 4, 2012(expired)· nominal 20-yr term from priority
Inventors:Donald L. Griffes
27
PatentIndex Score
3
Cited by
3
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a spark arrestor apparatus, as shown and described.

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