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For the Inventor, By the Inventor

Hong Kong, China

Unisafe Limited


USPTO Granted Patents = 2

Trademarks = 17

Forward Citations = 21

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1 inventor (with patents filed for the assignee):

goldMedal Toshihiko Yamashita (2 out of 6 patents)


2 patents:

1. 4868914 - Method for clearing unlocking key codes in an electronic locking device (1989-09-19),
2. 4851828 - Electronic locking devices (1989-07-25),
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USPTO Data Jan 1 1976 - Dec 30 2025

2 Patents

#1,155 in Hong Kong

#10,021 in China

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Hong Kong, China

Unisafe Limited

Forward Citations = 21

1 inventor:

goldMedal Toshihiko Yamashita (2 out of 6 patents)

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