SMITH, Judge.
The issue presented is whether, in view of the facts of record, appellants' invention relating to cryogenic liquid systems, is obvious within the meaning of 35 U.S.C. § 103. The real party in interest, by virtue of an assignment, is the National Aeronautics and Space Administration.
All three of the appealed claims were considered together. Appealed claim 22 describes a cryogenic liquid system as follows:
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