Learn more

NIPPON PISTON RING CO LTD

Overview
  • Total Patents
    1,998
  • GoodIP Patent Rank
    10,320
  • Filing trend
    ⇧ 4.0%
About

NIPPON PISTON RING CO LTD has a total of 1,998 patent applications. It increased the IP activity by 4.0%. Its first patent ever was published in 1959. It filed its patents most often in Japan, United States and Germany. Its main competitors in its focus markets mechanical elements, engines, pumps and turbines and machines are RIKEN KK, FEDERAL MOGUL BURSCHEID GMBH and KK RIKEN.

Patent filings per year

Chart showing NIPPON PISTON RING CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Sakamaki Hiroshi 231
#2 Horikoshi Yukio 145
#3 Urano Shigeru 122
#4 Takeguchi Shunsuke 117
#5 Nakamura Yoshikatsu 95
#6 Sugishita Susumu 92
#7 Takahashi Teruo 82
#8 Ogawa Katsuaki 79
#9 Onoda Motonobu 68
#10 Hiraoka Takeshi 66

Latest patents

Publication Filing date Title
WO2021066058A1 Sliding member and method for producing same, and coating film
WO2021066067A1 Sliding structure for internal combustion engine
WO2020158949A1 Multi-piece oil ring
JP2020075293A Wire molding machine, and manufacturing method of wire molding
WO2020095807A1 Piston ring
WO2020067539A1 Internal combustion engine oil ring
WO2020050211A1 Heat-resistant sintered alloy material
JP2021010211A Rotary electric machine and rotary electric machine manufacturing method
JP2020193656A Combination of sliding member and lubricant
WO2019221106A1 Iron-based sintered alloy valve seat for internal combustion engine
JP2020180568A Cylinder of internal combustion engine
JP2020051426A Valve seat made of iron-based sintered alloy for internal combustion engines having excellent heat release
WO2019151322A1 Valve seat and valve seat material
EP3719167A1 Sliding member
JP2019078267A Cylinder for internal combustion engine and manufacturing method
WO2019065830A1 Piston ring
JP2020032457A Wire molding machine, and manufacturing method of wire molding
US2020217416A1 Sliding member and coating film
JP2018157752A Permanent-magnet rotary electric machine
US2020284173A1 Sintered ferrous alloy valve seat exhibiting excellent thermal conductivity for use in internal combustion engine