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Current amplifier arrangement
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Patent number 5,140,282
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Issue date Aug 18, 1992
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U.S. Philips Corporation
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Job F. P. van Mil
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H03 - BASIC ELECTRONIC CIRCUITRY
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DC/AC bridge circuit
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Patent number 4,908,551
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Issue date Mar 13, 1990
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U.S. Philips Corporation
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Adrianus W. Ludikhuize
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Amplifier circuit
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Patent number 4,484,151
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Issue date Nov 20, 1984
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U.S. Philips Corporation
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Aloysius J. Nijman
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H03 - BASIC ELECTRONIC CIRCUITRY
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Conference system for telephony
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Patent number 4,477,696
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Issue date Oct 16, 1984
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U.S. Philips Corporation
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Adrianus W. M. van den Enden
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Conference system for telephony
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Patent number 4,425,478
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Issue date Jan 10, 1984
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U.S. Philips Corporation
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Job F. P. van Mil
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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