For the Inventor, By the Inventor

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Hong Kong, China

Betteli Inc Hong Kong

USPTO Granted Patents = 4

Forward Citations = 32

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2 inventors (with patents filed for the assignee):

Wu Feng Qing (3 out of 5 patents)

Ming Gui Yang (1 out of 3 patents)

4 patents: Sort by Forward Citations

1. 8261584 - Reversible mortise lock (2012-09-11),

2. 7350555 - Storm door with a lift-up lock case mortise and method of use (2008-04-01),

3. 7213426 - Storm door mortise lock that prevents lockout (2007-05-08),

4. 7134168 - Door closer with pre-set stops (2006-11-14),

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USPTO Data Jan 1 1976 - Dec 16 2025

4 Patents

#713 in Hong Kong

#5,562 in China

Hong Kong, China

Betteli Inc Hong Kong

Forward Citations = 32

2 inventors:

Wu Feng Qing (3 out of 5 patents)

Ming Gui Yang (1 out of 3 patents)

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