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Ralph H. Ringstad

G - Physics – 01 – R

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Automatic synchronizing monitor for parallel connection of...

H - Electricity – 02 – J
Patent

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Electrical power monitor for an a.c. source

G - Physics – 01 – R
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In-phase monitor for determining in-phase condition of two...

H - Electricity – 02 – P
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System for transferring a load between two power sources...

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Profile ID: LFCA-PAI-P-66169

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