Sambo Copper Alloy Co., Ltd.

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USPTO Granted Patents = 3

Trademarks = 2

Forward Citations = 30

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3 inventors (with patents filed for the assignee):

Keiichiro Oishi (2 out of 51 patents)

Takashi Hokazono (1 out of 1 patent)

Shinji Tanaka (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 7056396 - Copper/zinc alloys having low levels of lead and good machinability (2006-06-06),

2. 6413330 - Lead-free free-cutting copper alloys (2002-07-02),

3. 6063480 - Artificially patinated copper material (2000-05-16),

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USPTO Data Jan 1 1976 - Oct 27 2026

3 Patents

#952 in Osaka

#8,938 in Japan

Osaka, Japan

Sambo Copper Alloy Co., Ltd.

Forward Citations = 30

3 inventors:

Keiichiro Oishi (2 out of 51 patents)

Takashi Hokazono (1 out of 1 patent)

Shinji Tanaka (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sambo Copper Alloy Co., Ltd.. Retrieved from https://idiyas.com/company/sambo-copper-alloy-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]