USD257770SExpiredUtility

Double viewer cartridge

47
Assignee: GAF CORPPriority: Sep 22, 1978Filed: Sep 22, 1978Granted: Jan 6, 1981
Est. expirySep 22, 1998(expired)· nominal 20-yr term from priority
Inventors:Donald I. Loofbourow
47
PatentIndex Score
4
Cited by
2
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a double viewer cartridge, substantially as shown and described.

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