USD347447SExpiredUtility

Collapsible portable document file

42
Individually held — no corporate assignee on recordPriority: Aug 4, 1989Filed: Feb 5, 1990Granted: May 31, 1994
Est. expiryAug 4, 2009(expired)· nominal 20-yr term from priority
Inventors:Robert Isserstedt
42
PatentIndex Score
5
Cited by
5
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a collapsible portable document file, as shown and described.

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