USD325634SExpiredUtility

Portable spirometer

Assignee: WELCH ALLYN INCPriority: Mar 30, 1990Filed: Mar 30, 1990Granted: Apr 21, 1992

Est. expiryMar 30, 2010(expired)· nominal 20-yr term from priority

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Claims

exact text as granted — not AI-modified

The ornamental design for a portable spirometer, as shown and described.

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