Inventor
HIRAI MASAHARU
JP6 patents
⚠️ This page may combine multiple inventors who share the name “HIRAI MASAHARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ISHIHARA MINING & CHEMICAL CO
3 patentsUS4501774AFeb 26, 1985
Process for the production of cobalt-containing magnetic iron oxide powder
ISHIHARA MINING & CHEMICAL CO5 citations60
US4594267AJun 10, 1986
Process for producing cobalt-containing magnetic iron oxide powder
ISHIHARA MINING & CHEMICAL CO4 citations59
US4486467ADec 4, 1984
Process for producing cobalt-containing magnetic iron oxide powder
ISHIHARA MINING & CHEMICAL CO3 citations59