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Home › Automatic changeover system for communication networks which changes over from one communication network to another, an automatic changeover station for the same and an automatic changeover method of communication networks

Automatic changeover system for communication networks which changes over from one communication network to another, an automatic changeover station for the same and an automatic changeover method of communication networks

US Patent 6980804 · Granted Dec 27, 2005

Estimated economic value: $28,000 ⓘ

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