For the Inventor, By the Inventor

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Hong Kong, China

Practical Products Mfg. Ltd.

USPTO Granted Patents = 2

Forward Citations = 48

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1 inventor (with patents filed for the assignee):

Kai C Yau (2 out of 8 patents)

2 patents: Sort by Forward Citations

1. D336966 - Flashlight (1993-06-29),

2. D336965 - Flashlight (1993-06-29),

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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#1,155 in Hong Kong

#9,987 in China

Hong Kong, China

Practical Products Mfg. Ltd.

Forward Citations = 48

1 inventor:

Kai C Yau (2 out of 8 patents)

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