USD271432SExpiredUtility

Dust filtering respirator

54
Assignee: MINE SAFETY APPLIANCES COPriority: Jun 24, 1981Filed: Jun 24, 1981Granted: Nov 15, 1983
Est. expiryJun 24, 2001(expired)· nominal 20-yr term from priority
Inventors:Sheng-Chung LiaoJohn W. Neidhart
54
PatentIndex Score
10
Cited by
6
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a dust filtering respirator, as shown and described.

Join the waitlist — get patent alerts

Track USD271432S — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.