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Telephone control module case assembly
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Patent number D414188
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Issue date Sep 21, 1999
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Matthews Communications Management, Inc.
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Gordon H. Matthews
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D14 - Recording, communication, or information retrieval equipment
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Call management system case assembly
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Patent number D413894
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Issue date Sep 14, 1999
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Matthews Communications Management, Inc.
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D14 - Recording, communication, or information retrieval equipment
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Option bus
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Patent number 5,631,955
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Issue date May 20, 1997
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Siemens Business Communication Systems, Inc.
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Joel Q. Adams
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Option bus adapter
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Patent number 5,349,640
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Issue date Sep 20, 1994
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ROLM Company
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Tave P. Dunn
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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