Inventor
HIKONE AKIRA
JP7 patents
Patents
7 patentsUS12092222B2Sep 17, 2024
Piston ring combination, and internal combustion engine
TPR CO LTD0 citations49
US12196325B2Jan 14, 2025
Compression ring
TPR CO LTD0 citations48
US12173799B2Dec 24, 2024
Oil control ring
TPR CO LTD0 citations47
US12117084B2Oct 15, 2024
Combination of piston rings, and combination structure of piston and piston rings
TPR CO LTD0 citations42
US12000491B2Jun 4, 2024
Combination of piston rings, and combination structure of piston and piston rings
TPR CO LTD0 citations42
US12292118B2May 6, 2025
Piston ring
TPR CO LTD0 citations41
US10837399B2Nov 17, 2020
Method of manufacturing internal combustion engine, internal combustion engine, and connected cylinder
TPR CO LTD0 citations38