MANTON, Circuit Judge.
The patents sued on relate to fire-resisting safes or cabinets which are used for preserving documents, papers, or office records. They are constructed as a metallic cabinet formed with spaced inner and outer sheet metal walls, between which is placed a material of low heat conductivity which, in the event of fire, would retard the passage of heat and flames into the cabinet. Iron safes are old in the art, and, in construction, provided heavy...
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