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For the Inventor, By the Inventor

Tokyo, Japan

Playground Co., Ltd.


USPTO Granted Patents = 3

Forward Citations = 1

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2 inventors (with patents filed for the assignee):

goldMedal Keiji Ito (3 out of 26 patents)

silverMedal Hiroki Miyanishi (3 out of 3 patents)


3 patents:

1. 12254720 - Ticket issuing system, and ticket checking apparatus (2025-03-18),
2. 12230086 - Information processing server, information processing system, determination device, and method (2025-02-18),
3. 11941919 - Ticket issuing system, and ticket checking apparatus (2024-03-26),
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USPTO Data Jan 1 1976 - Dec 30 2025

3 Patents

#3,268 in Tokyo

#8,776 in Japan

...
Tokyo, Japan

Playground Co., Ltd.

Forward Citations = 1

2 inventors:

goldMedal Keiji Ito (3 out of 26 patents)

silverMedal Hiroki Miyanishi (3 out of 3 patents)

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