ROBB, Associate Justice.
Appeal from a decree in the Supreme Court of the District (now District Court of the United States) dismissing appellants' bill, filed under section 4915 R.S., as amended (35 U.S.C.A. § 63), seeking to authorize the issuance of a patent to appellant company, assignee of applicant Stephens.
The application contains five claims, of which the first and fifth are illustrative, and are here reproduced:
"1. An expansible hollow...
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