Frederick L. T. Tsang

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Sai Ying Pun, HK

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Patents Grantslast 30 patents

Information Patent Grant
Housing for an electronic instructional game apparatus
- Patent number D360224
- Issue date Jul 11, 1995
- VTech Industries, Inc.
- Chi K. W. Chow
- D19 - Office supplies
Information Patent Grant
Electronic educational activity toy
- Patent number D358421
- Issue date May 16, 1995
- VTech Industries, Inc.
- Chi Ka-Wah Chow
- D19 - Office supplies
Information Patent Grant
Walker
- Patent number D353566
- Issue date Dec 20, 1994
- Video Technology Industries, Inc.
- Chi K. W. Chow
- D12 - Transportation
Information Patent Grant
Activity toy and walker device
- Patent number 5,362,272
- Issue date Nov 8, 1994
- VTech Industries, Inc.
- Chi K. W. Chow
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Housing for an electronic instructional game apparatus
- Patent number D350373
- Issue date Sep 6, 1994
- VTech Industries, Inc.
- Chi K. W. Chow
- D21 - Games, toys, and sports goods