ANDERSON, Circuit Judge.
In this patent infringement suit, the District Court (Morton, J.) held claims 2 and 11 of the Jennings reissue patent (No. 15,637, granted June 26, 1923) and claim 13 of the second Nash patent (No. 1,091,529, granted March 31, 1914) valid and infringed. The main issue is the validity of claim 2 of the Jennings patent, covering a combination of old elements for a wet vacuum pumping apparatus and reading:
"The combination, with the separating...
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