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The ornamental design for the coupling transformer, as shown. |
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FIG. 1 is a front elevational view of the coupling transformer according to the invention;
FIG. 2 is a top plan view of FIG. 1;
FIG. 3 is a left side elevational view of FIG. 1;
FIG. 4 is a right side elevational view of FIG. 1;
FIG. 5 is a bottom plan view of FIG. 1; and
FIG. 6 is a rear elevational view of FIG. 1.
Alber, Friedrich, Dedelmahr, Rudolf, Bendel, Wolfgang, Seeliger, Klaus, Altmann, Gerhard, Eyrich, Hermann, Link, Rudolf
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