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DONALDSON CO., INC. v. PNEUMAFIL CORP.

No. C-C-82-691-M.

617 F.Supp. 1428 (1985)

DONALDSON COMPANY, INC., Plaintiff, v. PNEUMAFIL CORPORATION, Defendant.

United States District Court, W.D. North Carolina, Charlotte Division.

September 13, 1985.

Attorney(s) appearing for the Case

E. Osborne Ayscue, Jr., Helms, Mulliss & Johnston, Charlotte, N.C., Alan G. Carlson, Merchant, Gould, Smith, Edell, Welter & Schmidt, Minneapolis, Minn., for plaintiff.

Francis M. Pinckney, Richards, Shefte & Pinckney, Charlotte, N.C., for defendant.

FINDINGS OF FACT AND CONCLUSIONS OF LAW

McMILLAN, District Judge.

This case came on for trial before the court without a jury on August 13-16, 1984. It is an action for infringement of U.S. Patent No. 4,218,227, granted to Robert E. Frey, assigned to plaintiff Donaldson Company, Inc., and allegedly infringed by defendant Pneumafil Corporation. The alleged invention is a type of industrial dust collector which is embodied in a cylindrical cartridge with pleated...

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