Inventor
NAKAOKA JUNICHI
JP8 patents
⚠️ This page may combine multiple inventors who share the name “NAKAOKA JUNICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUMITOMO SPEC METALS
7 patentsUS4875987AOct 24, 1989
Grooved magnetic substrates and method for producing the same
SUMITOMO SPEC METALS25 citations92
US4808455AFeb 28, 1989
Magnetic recording disc and process for producing the same
SUMITOMO SPEC METALS20 citations81
US4690846ASep 1, 1987
Recording disk substrate members and process for producing same
SUMITOMO SPEC METALS23 citations81
US4953051AAug 28, 1990
Composite magnetic head
SUMITOMO SPEC METALS13 citations73
US4816128AMar 28, 1989
Process for producing substrate member for magnetic recording disc
SUMITOMO SPEC METALS10 citations73
US4777074AOct 11, 1988
Grooved magnetic substrates and method for producing the same
SUMITOMO SPEC METALS8 citations73
US4636420AJan 13, 1987
Grooved magnetic substrates and method for producing the same
SUMITOMO SPEC METALS9 citations71