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For the Inventor, By the Inventor

Tokyo, Japan

K.k. Hanzawa Corporation


USPTO Granted Patents = 2

Forward Citations = 34

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2 inventors (with patents filed for the assignee):

goldMedal Tsuneo Hanzawa (1 out of 20 patents)

silverMedal Tuneo Hanzawa (1 out of 1 patent)


2 patents:

1. 5127869 - Sound producing toy (1992-07-07),
2. 4577528 - Driving/turnaround device for a remote controlled toy vehicle (1986-03-25),
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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#4,062 in Tokyo

#10,962 in Japan

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Tokyo, Japan

K.k. Hanzawa Corporation

Forward Citations = 34

2 inventors:

goldMedal Tsuneo Hanzawa (1 out of 20 patents)

silverMedal Tuneo Hanzawa (1 out of 1 patent)

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