USD310431SExpiredUtility

Gas delivery mask

Assignee: LIFELINE LTDPriority: Jan 30, 1987Filed: Jul 24, 1987Granted: Sep 4, 1990

Est. expiryJan 30, 2007(expired)· nominal 20-yr term from priority

PatentIndex Score

266

Cited by

References

Claims

exact text as granted — not AI-modified

The ornamental design for a gas delivery mask, as shown and described.

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