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Selective base etching
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Patent number 6,852,638
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Issue date Feb 8, 2005
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Infineon Technologies AG
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Ted Johansson
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H01 - BASIC ELECTRIC ELEMENTS
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Trench-isolated bipolar devices
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Patent number 6,657,242
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Issue date Dec 2, 2003
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Telefonaktiebolaget LM Ericsson (publ)
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Hans Norström
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H01 - BASIC ELECTRIC ELEMENTS
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Integrated circuits
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Patent number 6,291,859
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Issue date Sep 18, 2001
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Telefonaktiebolaget LM Ericsson
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Andrej Litwin
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H01 - BASIC ELECTRIC ELEMENTS
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Protective circuit
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Patent number 6,163,446
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Issue date Dec 19, 2000
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Telefonaktiebolaget LM Ericsson
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Hans Norstrom
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H01 - BASIC ELECTRIC ELEMENTS
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