USD310840SExpiredUtility
Door viewer
Individually held — no corporate assignee on recordPriority: Sep 2, 1988Filed: Sep 2, 1988Granted: Sep 25, 1990
Est. expirySep 2, 2008(expired)· nominal 20-yr term from priority
Inventors:Donald E. Degnan
44
PatentIndex Score
4
Cited by
7
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a door viewer, as shown.
Join the waitlist — get patent alerts
Track USD310840S — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.