USD313298SExpiredUtility

Spiral chute

64
Assignee: THE POST OFFICEPriority: Dec 23, 1987Filed: Mar 9, 1988Granted: Dec 25, 1990
Est. expiryDec 23, 2007(expired)· nominal 20-yr term from priority
Inventors:Cetin B. ElmasDavid Tolond
64
PatentIndex Score
16
Cited by
15
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for spiral chute, as shown and described.

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