LandOfFree - US Patents - Listing for Telephonic communications,Supervisory or control line signaling,Substation originated

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Dahlkvist H. F. Mikael

Inventor

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Danish International, Inc.

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Darr Roger Raymond

Inventor

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Das Archan

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Datanet Corp.

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Davey Melville G.

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Davox Corporation

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Day Benjamin Wilson

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Day, Jr. Benjamin W.

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Deakins Darrell

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DeSalvo Christopher Joseph

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Dialing Devices Inc.

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Digitran Corporation

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Dorland Hendricus A. H.

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Dowling, Jr. Thomas W.

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Draganoff Georgi H.

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Drummond Larry G.

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Dufford Dennis W.

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