USD538318SExpiredUtility
Sight glass
Est. expiryJul 27, 2025(expired)· nominal 20-yr term from priority
Inventors:Curtis Sprague
66
PatentIndex Score
17
Cited by
11
References
1
Claims
Claims
exact text as granted — not AI-modifiedCLAIM
The ornamental design for a sight glass, as shown and described.Join the waitlist — get patent alerts
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