US PATENT SUBCLASS 320 / DIG 28
REGULATING TRANSFORMER (E.G., HIGH LEAKAGE, FERRO-RESONANT, ETC.)
Current as of:
June, 1999
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320 /
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ELECTRICITY: BATTERY OR CAPACITOR CHARGING OR DISCHARGING
DIG 28
REGULATING TRANSFORMER (E.G., HIGH LEAKAGE, FERRO-RESONANT, ETC.)