USD340696SExpiredUtility

Ball-operated control device for electronic circuits

Assignee: AppointPriority: Nov 13, 1991Filed: Nov 13, 1991Granted: Oct 26, 1993

Est. expiryNov 13, 2011(expired)· nominal 20-yr term from priority

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exact text as granted — not AI-modified

The ornamental design for a ball-operated control device for electronic circuits, as shown and described.

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