Inventor
UMETSU CHIHARU
JP9 patents
⚠️ This page may combine multiple inventors who share the name “UMETSU CHIHARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NHK SPRING CO LTD
8 patentsUS6789576B2Sep 14, 2004
Accumulator
NHK SPRING CO LTD62 citations96
US6286552B1Sep 11, 2001
Accumulator and manufacturing process thereof
NHK SPRING CO LTD56 citations95
US5098071AMar 24, 1992
Die spring apparatus
NHK SPRING CO LTD60 citations95
US4858898AAug 22, 1989
Accumulator
NHK SPRING CO LTD81 citations93
US6810915B2Nov 2, 2004
Accumulator having a safety valve
NHK SPRING CO LTD53 citations92
US5027637AJul 2, 1991
Die cushion for applying pressure to a press machine via gas pressurized push rods
NHK SPRING CO LTD35 citations92
US4763882AAug 16, 1988
Coated coil spring
NHK SPRING CO LTD38 citations88
US6525290B2Feb 25, 2003
Accumulator and manufacturing process thereof
NHK SPRING CO LTD11 citations73