USD550360SExpiredUtility
Portable oxygen concentrator
Est. expirySep 2, 2025(expired)· nominal 20-yr term from priority
79
PatentIndex Score
27
Cited by
7
References
1
Claims
Claims
exact text as granted — not AI-modifiedCLAIM
The ornamental design for a portable oxygen concentrator, as shown.Join the waitlist — get patent alerts
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