U.S. federal trademark · Serial No. 76636793 · Reg. No. 3189786
Electrical test equipment for the electric power generating and transmission industry; Apparatus for identification of a phase of a transmission line; Apparatus for identification of a phase of a line relative to a known phase; Apparatus for determining phase angle between a selected measurement point and a reference point; Portable apparatus for measuring a phase relative to a known phase; A reference unit and a field unit for measuring a phase relative to a known phase
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