USD470821SExpiredUtility

Digital directional coupler

Assignee: VIEWSONICS INCPriority: May 8, 2001Filed: May 8, 2001Granted: Feb 25, 2003

Est. expiryMay 8, 2021(expired)· nominal 20-yr term from priority

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Claims

exact text as granted — not AI-modified

The ornamental design for a digital directional coupler, as shown and described.

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