USD439198SExpiredUtility

Composition of twisted springs

30
Priority: Jun 23, 1999Filed: Jun 23, 1999Granted: Mar 20, 2001
Est. expiryJun 23, 2019(expired)· nominal 20-yr term from priority
Inventors:Stoyan Ivanov Sargoytchev
30
PatentIndex Score
2
Cited by
5
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a composition of twisted springs, as shown.

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