Inventor
HIRAISHI IWAO
JP7 patents
⚠️ This page may combine multiple inventors who share the name “HIRAISHI IWAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON PISTON RING CO LTD
4 patentsUS7493882B2Feb 24, 2009
Combination of a cylinder liner and a piston ring
NIPPON PISTON RING CO LTD13 citations80
US11047479B2Jun 29, 2021
Method for producing piston ring with recess
NIPPON PISTON RING CO LTD0 citations59
US10330198B2Jun 25, 2019
Multi-piece oil ring
NIPPON PISTON RING CO LTD0 citations51
US10514097B2Dec 24, 2019
Method for producing piston ring with recess
NIPPON PISTON RING CO LTD0 citations48