Growing community of inventors

Hong Kong, China

Frederick L Tsang

Average Co-Inventor Count = 2.21

ph-index = 6

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 97

Frederick L TsangChi K Chow (5 patents)Frederick L TsangChung P Lau (2 patents)Frederick L TsangIvy W Yiu (1 patent)Frederick L TsangSannie L Chan (1 patent)Frederick L TsangFrederick L Tsang (7 patents)Chi K ChowChi K Chow (7 patents)Chung P LauChung P Lau (3 patents)Ivy W YiuIvy W Yiu (2 patents)Sannie L ChanSannie L Chan (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Vtech Industries, Inc. (5 from 30 patents)

2. Video Technology Industries, Inc. (1 from 29 patents)


7 patents:

1. D413149 - Electronic learning aid housing

2. D407748 - Electronic educational game housing

3. D360224 - Housing for an electronic instructional game apparatus

4. D358421 - Electronic educational activity toy

5. D353566 - Walker

6. 5362272 - Activity toy and walker device

7. D350373 - Housing for an electronic instructional game apparatus

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idiyas.com
as of
1/11/2026
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