In re Cohen

This is an appeal from a decision of the Board of Appeals of the United States Patent Office rejecting claims 4 to 7 inclusive, 13, 15 *878to 18 inclusive, 20, 22, 23, 24, 26, 27, and 28 of appellant’s application for a patent.

Claims 19, 21 and 25 were also rejected by the Primary Examiner, but the board reversed Ms decision respecting these claims and they stand allowed.

Claims 4 and 27 are illustrative of the involved subject matter and read as follows:

4. In an apparatus of the character described, the combination of an alternating current energized electronic tube circuit and a grid circuit…