MANDELBAUM, District Judge.
The plaintiff brings two suits on eleven patents relating to improvements or inventions upon respirators generally used for the protection of persons who in the course of their work come in contact with dust, gases and fumes, claiming that the defendant infringed on these patents.
It is claimed that the defendant sold three types of respirators known and described as Willson No. 200, 750 and 770, each of which it is alleged infringes...
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