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Telephone key expansion unit
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Patent number D387063
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Issue date Dec 2, 1997
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Siemens Rolm Communications Inc.
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Stefan Hillenmayer
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D14 - Recording, communication, or information retrieval equipment
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Telephone
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Patent number D386759
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Issue date Nov 25, 1997
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Siemens Business Communication Systems
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Erich C. Elkins
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D14 - Recording, communication, or information retrieval equipment
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Multiple lightpipe device
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Patent number 5,572,613
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Issue date Nov 5, 1996
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Siemens Rolm Communications Inc.
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Mary E. Kingsbury
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G02 - OPTICS
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Telephone
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Patent number D375095
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Issue date Oct 29, 1996
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Siemens Rolm Communications Inc.
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Stefan Hillenmayer
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D14 - Recording, communication, or information retrieval equipment
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Telephone key expansion unit
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Patent number D374674
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Issue date Oct 15, 1996
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Siemens Rolm Communications Inc.
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Erich C. Elkins
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D14 - Recording, communication, or information retrieval equipment
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Telephone
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Patent number D374667
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Issue date Oct 15, 1996
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Siemens Palm Communication Inc.
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Erich C. Elkins
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D14 - Recording, communication, or information retrieval equipment
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