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User installed telephone option module
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Patent number 5,995,621
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Issue date Nov 30, 1999
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Siemens Information and Communication Networks, Inc.
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David Bryant
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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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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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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Telephone set
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Patent number D346599
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Issue date May 3, 1994
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ROLM Compnay
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Timothy D. Wetzel
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D14 - Recording, communication, or information retrieval equipment
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Telephone set
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Patent number D346385
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Issue date Apr 26, 1994
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ROLM Company
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Timothy D. Wetzel
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D14 - Recording, communication, or information retrieval equipment
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Telephone set
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Patent number D345978
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Issue date Apr 12, 1994
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ROLM Company
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Timothy D. Wetzel
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D14 - Recording, communication, or information retrieval equipment
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Telephone set
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Patent number D345979
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Issue date Apr 12, 1994
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ROLM Company
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Timothy D. Wetzel
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D14 - Recording, communication, or information retrieval equipment
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Telephone set
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Patent number D340054
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Issue date Oct 5, 1993
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ROLM Company
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Timothy D. Wetzel
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D14 - Recording, communication, or information retrieval equipment
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Add-on console for a telephone set
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Patent number D340057
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Issue date Oct 5, 1993
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ROLM Company
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Timothy D. Wetzel
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D14 - Recording, communication, or information retrieval equipment