USD316195SExpiredUtility

Double helix bookcase

44
Assignee: Space Age Design FurniturePriority: Dec 23, 1987Filed: Dec 23, 1987Granted: Apr 16, 1991
Est. expiryDec 23, 2007(expired)· nominal 20-yr term from priority
Inventors:David Mark
44
PatentIndex Score
5
Cited by
6
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a double helix bookcase, as shown and described.

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