U.S. federal trademark · Serial No. 71117974 · Reg. No. 0136818
File-Signals-Namely, a Separable Index or Guide for Attachment to Cards, Pages of Books and the Like and Index-Tabs-Namely, a Device with Means for Attachment to Cards, Leaves of Books and the Like, and Provided with Means Whereby Writing May Be Inscribed Upon Same
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