USD302018SExpiredUtility

Placer mining sluice

54
Assignee: MESSENGER JACKPriority: Sep 17, 1986Filed: Sep 17, 1986Granted: Jul 4, 1989
Est. expirySep 17, 2006(expired)· nominal 20-yr term from priority
Inventors:Jack MessengerViggo Mathiesen
54
PatentIndex Score
13
Cited by
6
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a placer mining sluice, as shown.

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