GRAHAM, Presiding Judge.
This is an appeal from the Board of Appeals of the United States Patent Office rejecting claims 1 to 8, inclusive, of the application of the appellants for a patent on alleged improvements in "electric lighting tubes with carbonic acid filling." The decision of the Board of Appeals affirmed that of the Examiner.
Typical claims are 2 and 4, which are as follows:
"2. An electrical discharge device comprising an envelope, electrodes...
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