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MANTZ v. KERSTING

No. 59-Y Civil.

29 F.Supp. 706 (1939)

MANTZ et al. v. KERSTING.

District Court, S. D. California, C. D.

October 14, 1939.

Attorney(s) appearing for the Case

Joseph F. Westall, of Los Angeles, Cal., for plaintiffs.

Harris, Kiech, Foster & Harris by Ward D. Foster and Ford Harris, Jr., of Los Angeles, Cal., for defendant.

YANKWICH, District Judge.

Plaintiffs charge infringement by the defendants of Mantz Letters Patent No. 1,898,584, issued February 21, 1933, relating to a spring sash balance, and Mantz Letters Patent No. 2,128,007, issued August 23, 1938, relating to a combination hook and glider, to be used with a spring sash balance.

The art is old. Neither invention is primary. They must, therefore, be limited to the very structure...

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