Inventor
UMEHA GENKICHI
JP11 patents
⚠️ This page may combine multiple inventors who share the name “UMEHA GENKICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON PISTON RING CO LTD
10 patentsUS4644912AFeb 24, 1987
Cam shaft and method of manufacture
NIPPON PISTON RING CO LTD51 citations94
US4615310AOct 7, 1986
Camshaft with lubricating oil supplying function
NIPPON PISTON RING CO LTD26 citations92
US4595556AJun 17, 1986
Method for manufacturing camshaft
NIPPON PISTON RING CO LTD32 citations92
US4665766AMay 19, 1987
Shaft member
NIPPON PISTON RING CO LTD21 citations81
US4612695ASep 23, 1986
Method of manufacturing a hollow cam shaft
NIPPON PISTON RING CO LTD22 citations81
US4556532ADec 3, 1985
Method for manufacturing camshaft
NIPPON PISTON RING CO LTD10 citations73
US4513977AApr 30, 1985
Steel floating seal with remelted deposit-alloyed wear surfaces
NIPPON PISTON RING CO LTD11 citations73
US4473232ASep 25, 1984
Oil scraper ring with controlled gap arrangement
NIPPON PISTON RING CO LTD15 citations71
US4732310AMar 22, 1988
Composite camshaft and method of making the same
NIPPON PISTON RING CO LTD15 citations68
US4649011AMar 10, 1987
Method of making a cam shaft
NIPPON PISTON RING CO LTD2 citations60