LUHRING, Justice.
The court can not agree with the Patent Office tribunals in their rejection of the claims in issue.
The Pavitt invention permits fuel gas to be supplied to the multitudinous combustion flues of a coke oven battery at the precise predeterminable rates needed for regular operation without requiring the tedious and costly "trial and error" adjustments of the fuel gas supply connections to the different flues always necessary heretofore.
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