USD335173SExpiredUtility

Coupling element for connecting the flanged ends of ducts

44
Assignee: LEUFSTEDT STEFANPriority: Dec 27, 1989Filed: Jun 22, 1990Granted: Apr 27, 1993
Est. expiryDec 27, 2009(expired)· nominal 20-yr term from priority
Inventors:Stefan LeufstedtCarl-Eric Jaderberg
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PatentIndex Score
6
Cited by
6
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a coupling element for connecting the flanged ends of ducts, as shown and described.

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