Application of David J. Carlson

BALDWIN, Judge.

This appeal is from the Patent Office Board of Appeals decision affirming the examiner’s rejection of claims 4 and 23 in appellant’s application1 on the ground of double patenting for failing to patent-ably distinguish over the claims of the copending application, of Hofstein,2 assigned to the assignee of the instant application. Claims 6, 9-19, 22, and 24 have been allowed.

THE INVENTION

The invention relates to electrical circuitry involving an insulated gate, field-effect semiconductor. As background, a semiconductor of this general type usually includes a substrate of doped…