SIMONS, Circuit Judge.
The action below was for infringement of three Zander patents for air cleaners of the combined liquid washing and filtering type used principally with automobile engines. The patents are No. 1,951,384 issued March 30, 1934 upon an application filed February 25, 1932; No. 2,004,150 issued June 11, 1935, upon an application filed April 12, 1933, and No. 2,018,755 issued October 29, 1935, upon an application filed February 19, 1934. The court held...
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