U.S. federal trademark · Serial No. 76628892 · Reg. No. 3092038
Material system comprised of silicon and one or more of the following-- oxygen, nitrogen, carbon, germanium, fluorine, phosphorus, and boron, used for optical waveguide components and devices, namely, amplitude filters, phase filters, dispersion compensators, variable optical attenuators, switches or add/drop multiplexers for use in telecommunications
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