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Inventor
HAMA MASAHIDE
JP
5 patents
⚠️ This page may combine multiple inventors who share the name “HAMA MASAHIDE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TPR CO LTD
3 patents
US10072755B2
Sep 11, 2018
Combination oil ring
TPR CO LTD
2 citations
70
US9845873B2
Dec 19, 2017
Combination oil ring
TPR CO LTD
2 citations
70
US11603929B2
Mar 14, 2023
Wire for piston ring, and manufacturing method of piston ring
TPR CO LTD
0 citations
47
AYUZAWA NORIAKI
2 patents
US9726286B2
Aug 8, 2017
Combination oil ring
AYUZAWA NORIAKI
2 citations
68
US9458933B2
Oct 4, 2016
Combination oil ring
AYUZAWA NORIAKI
5 citations
64