Application of Friedrich Karl Knohl and Nels Nelsson

WORLEY, Chief Judge.

This appeal is from the decision of the Board of Appeals affirming the examiner’s rejection of claims 1-3 in appellants’ application 1 for “Plasterboard Fastening Screw.”

The sole ground of rejection is “double patenting” in view of the claims of appellants’ patent No. 3,056.234. 2 To place the case in perspective with respect to the numerous other double patenting rejections appealed to this court of late, it is apparent from the letters of the examiner and decision of the board that they regard appellants to be claiming the same invention in their application claims as is…