GRIMSHAW, J.S.C.
The plaintiff, John W. Clerke, is the inventor of a threadless pipe coupling of considerable value. On September 10, 1947, he made application for a patent which was granted during the pendency of the litigation. Both parties claim title to the patent and an adjudication of their respective rights is sought.
The pretrial order limited the issues as follows:
"a. The extent of the interests of the plaintiff and the defendant in the invention...
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