USD258084SExpiredUtility
Portable respirator
Individually held — no corporate assignee on recordPriority: Jan 30, 1978Filed: Jan 30, 1978Granted: Jan 27, 1981
Est. expiryJan 30, 1998(expired)· nominal 20-yr term from priority
Inventors:Walter W. Weingarten
44
PatentIndex Score
7
Cited by
2
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a portable respirator, as shown and described.
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