USD436234SExpiredUtility

Green helmet respiratory protection device

26
Assignee: 3M INNOVATIVE PROPERTIES COPriority: Mar 10, 1998Filed: Mar 10, 1998Granted: Jan 9, 2001
Est. expiryMar 10, 2018(expired)· nominal 20-yr term from priority
Inventors:M. Antonia SáezDavid R. Schlaefer
26
PatentIndex Score
3
Cited by
15
References
1
Claims

Claims

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

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