Power supply system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4425512
SERIAL NO

06367078

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A power supply system for supplying a d.c. current from a center equipment to a terminal device through a two-wire line, is capable of properly supplying the current for communicating purposes irrespective of the connection condition of the two-wire line and accurately stopping the supply of current to the terminal device in the non-communicating condition.

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First Claim

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Patent Owner(s)

  • HITACHI, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishiguro, Hideo Yokohama, JP 3 27
Ogawa, Makoto Chigasaki, JP 156 1866
Tomooka, Keiji Yokohama, JP 16 138

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