GRIFFIN B. BELL, Circuit Judge.
This appeal is from judgment for defendant, appellee here, in a patent infringement suit. It concerns differential pressure measuring meters, in wide use in the oil, gas and chemical industries for measuring the quantity of gas or liquids passing through pipelines. The parties each manufacture meters having many characteristics in common for this purpose.
The patents in suit are numbered 2,762,362, claims 4, 6, 7, and 10, issued...
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