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CHICAGO TELEPHONE SUPPLY CO. v. STACKPOLE CARBON CO.

No. 3170.

27 F.Supp. 27 (1939)

CHICAGO TELEPHONE SUPPLY CO. v. STACKPOLE CARBON CO.

District Court, W. D. Pennsylvania.

March 30, 1939.

Attorney(s) appearing for the Case

Stebbins, Blenko & Parmelee and L. Clyde Strickland, all of Pittsburgh, Pa., and Wilkinson, Huxley, Byron & Knight, George L. Wilkinson, and Howard W. Hodgkins, all of Chicago, Ill., for plaintiff.

Brown, Critchlow & Flick, Jo Baily Brown, and Victor A. Peckham, all of Pittsburgh, Pa., for defendant.

Discussion.

GIBSON, District Judge.

The plaintiff charges the defendant with infringement of its Schellenger Patents Numbers 1,920,217 and 1,996,175, each for a Rheostat. No. 1,996,175 is a division of the other patent, and the structure of each of the patented devices is identical with that of the other.

Patent No. 1,920,217.

This patent discloses a compact form of rheostat suitable for use as volume controls in radio sets. In the rheostat...

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