Ta-Tsung Dan

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New Taipei, TW

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Patents Grantslast 30 patents

Information Patent Grant
Elevating speaker for use in bathtub
- Patent number D1030704
- Issue date Jun 11, 2024
- TROLLING ENTERPRISES CO., LTD.
- Huei-Ching Chou Lu
- D14 - Recording, communication, or information retrieval equipment
Information Patent Grant
Elevating speaker device for use in bathtub
- Patent number 11,582,541
- Issue date Feb 14, 2023
- TROLLING ENTERPRISES CO. LTD.
- Huei-Ching Chou Lu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE