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Hitachi, JA
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last 30 patents
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Patent Grant
Gallium arsenide infrared light emitting diode
Patent number
4,008,485
Issue date
Feb 15, 1977
Hitachi, Ltd.
Tadahiko Miyoshi
H01 - BASIC ELECTRIC ELEMENTS
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Patent Grant
Method of producing infrared luminescent diodes
Patent number
3,998,672
Issue date
Dec 21, 1976
Hitachi, Ltd.
Tadahiko Miyoshi
H01 - BASIC ELECTRIC ELEMENTS