Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yohei Takahashi0
Minoru Okamoto0
Miyoka Ueda0
Susumu Arai0
Date of Patent
November 5, 2019
0Patent Application Number
155474450
Date Filed
February 18, 2016
0Patent Citations
Patent Primary Examiner
Patent abstract
A piston has a piston main body including an aluminum alloy, and a covering layer formed on the outer surface of the piston main body, and the covering layer has a first plating layer including an iron-phosphorous alloy, and a second plating layer including a nickel-phosphorous alloy formed on the first plating layer.
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