USD469580SExpiredUtility

Red helmet respiratory protection device

18
Assignee: 3M INNOVATIVE PROPERTIES COPriority: Mar 10, 1998Filed: Mar 10, 1998Granted: Jan 28, 2003
Est. expiryMar 10, 2018(expired)· nominal 20-yr term from priority
Inventors:David R. SchlaeferM. Antonia Sáez
18
PatentIndex Score
0
Cited by
20
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a red helmet respiratory protection device, as shown and described.

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