USD333349SExpiredUtility

Portable oxygen system

Assignee: AMERICAN SAFETY FLIGHT SYSTPriority: Aug 20, 1990Filed: Aug 20, 1990Granted: Feb 16, 1993

Est. expiryAug 20, 2010(expired)· nominal 20-yr term from priority

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exact text as granted — not AI-modified

The ornamental design for a portable oxygen system, as shown.

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