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NATIONAL FILTERS, INC. v. RESEARCH PRODUCTS CORPORATION

No. 23883.

384 F.2d 516 (1967)

NATIONAL FILTERS, INC., Appellant, v. RESEARCH PRODUCTS CORPORATION, Appellee.

United States Court of Appeals Fifth Circuit.

October 11, 1967.

Attorney(s) appearing for the Case

M. A. Baskin, John Cyril Malloy, Miami, Fla., for appellant.

Elwin A. Andrus, Frank S. Andrus, Milwaukee, Wis., Melvin T. Boyd, Blackwell, Walker & Gray, Miami, Fla., Andrus & Starke, Milwaukee, Wis., of counsel, for appellee.

Before WISDOM and GODBOLD, Circuit Judges, and McRAE, District Judge.

GODBOLD, Circuit Judge:

National Filters, Inc., the defendant below, appeals from a judgment that certain claims of two United States patents are valid and that it has infringed them. The suit was brought by Research Products Corporation, assignee of Patents No. 3,031,827 and 3,155,560.

Patent '827 is for a filter for liquids or gases, made of multiple layers of slit and expanded metal foil, in which the layers of metal forming it are bonded together by a...

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