USD301774SExpiredUtility

Respiratory mask

52
Assignee: HANS RUDOLPH INCPriority: May 18, 1987Filed: May 18, 1987Granted: Jun 20, 1989
Est. expiryMay 18, 2007(expired)· nominal 20-yr term from priority
Inventors:Kevin A. RudolphDonald C. Zavala
52
PatentIndex Score
8
Cited by
3
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a respiratory mask, as shown and described.

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