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2020
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Invention
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Vacuum tube amplification system capable of reducing residual noise and a grounding method thereo... |
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2019
|
Invention
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Audio system with sound-field-type nature sound effect. An audio system with sound-field-type nat... |
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Invention
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Three-piece extensible movable soundbox. A three-piece extensible movable soundbox includes: a ho... |
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Invention
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Vacuum tube subwoofer extraction circuit system. A vacuum tube subwoofer extraction circuit syste... |
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Invention
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Vacuum tube and transistor amplifier natural sound field tone dividing system. A vacuum tube and ... |
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P/S
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Speakers, audio equipment/apparatus, fitted cases for audio equipment/apparatus; Cabinets for lou... |
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P/S
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Audio speakers, Audio device case, namely, protective case for audio equipment in the nature of s... |
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2018
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Invention
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Vacuum tube speaker |
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Invention
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Vacuum tube rear device. The present invention provides a device with rear-mounted vacuum tubes, ... |
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2017
|
Invention
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Vacuum tube audio amplifier. The present invention provides a vacuum tube audio amplifier which i... |
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2012
|
Invention
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Control apparatus for an electronic stopwatch.
The present invention provides an apparatus for c... |
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1999
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Invention
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Electronic trip meter for a bicycle. An electronic trip meter for a bicycle is provided. The elec... |
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1997
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P/S
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Altimeters; clinometers; distance measuring apparatuses; bicycle computers; speed meters; odomete... |
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1995
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P/S
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Bicycle computers; speed meters; odometers; relays; exercise and fitness equipment, namely magnet... |
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Invention
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Device for demonstrating and testing electronic meters for bicycles. A device for demonstrating a... |
