USD447974SExpiredUtility

Portable gas detector-alarm

Assignee: RIKEN KEIKI KKPriority: Oct 17, 2000Filed: Oct 17, 2000Granted: Sep 18, 2001

Est. expiryOct 17, 2020(expired)· nominal 20-yr term from priority

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exact text as granted — not AI-modified

The ornamental design for a portable gas detector-alarm, as shown and described.

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