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TEIKOKU PISTON RING CO LTD

Overview
  • Total Patents
    581
About

TEIKOKU PISTON RING CO LTD has a total of 581 patent applications. Its first patent ever was published in 1974. It filed its patents most often in Japan, United States and EPO (European Patent Office). Its main competitors in its focus markets mechanical elements, engines, pumps and turbines and surface technology and coating are FED MOGUL BURSCHEID GMBH, COFAP and KK RIKEN.

Patent filings in countries

World map showing TEIKOKU PISTON RING CO LTDs patent filings in countries

Patent filings per year

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

Top inventors

# Name Total Patents
#1 Harayama Akira 60
#2 Yamashita Nobuyuki 58
#3 Ishida Masao 58
#4 Tanaka Shoji 48
#5 Hama Fujio 46
#6 Harakawa Yoshio 37
#7 Fukutome Hiroto 36
#8 Nakazawa Masafumi 29
#9 Oguchi Masahiro 26
#10 Naruse Yoshio 25

Latest patents

Publication Filing date Title
JP2011220519A Combined oil ring
JP2011200902A Cylindrical sliding member and method for producing the same
JP2011202576A Cylinder liner
JP2011189455A Method of manufacturing sliding member and sliding member
JP2011185383A Combination oil ring
JP2011174562A Combined oil ring
JP2011169388A Piston ring
JP2011163431A Combined oil ring
JP2011163430A Combined oil ring and method of manufacturing the same
JP2011073038A Cylindrical sliding member and method for manufacturing the same
JP2010270801A Combined oil ring
JP2010196872A Combined piston ring
JP2010151013A Piston device for internal combustion engine
JP2010060085A Combination of sliding material
JP2009281421A Piston ring
JP2009264349A Combined oil ring
JP2009264347A Insert casting structure
JP2009228685A Piston ring with plate spring, and combination of piston and piston ring
JP2008095966A Combination of cylinder and piston ring
JP2009126165A Sealing ring made of synthetic resin and injection molding metallic mold