TK

Takeo Kooroki

NC Nippon Piston Ring Co.: 2 patents #59 of 208Top 30%
Overall (All Time): #2,338,084 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4762329 Spacer expander for piston rings — 1988-08-09
4579355 Nitrided steel piston ring with oxide film — 1986-04-01