Inventor
NINOMIYA RYUJI
JP8 patents
⚠️ This page may combine multiple inventors who share the name “NINOMIYA RYUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUI MINING & SMELTING CO
5 patentsUS5718868AFeb 17, 1998
Lead-free tin-zinc-based soldering alloy
MITSUI MINING & SMELTING CO18 citations90
US5658528AAug 19, 1997
Lead-free solder
MITSUI MINING & SMELTING CO27 citations90
US6531003B2Mar 11, 2003
Abrasion resistant copper alloy, copper alloy powder for build-up cladding, and engine cylinder head
MITSUI MINING & SMELTING CO6 citations72
US5958333ASep 28, 1999
Tin-silver-based soldering alloy
MITSUI MINING & SMELTING CO11 citations71
US5993736ANov 30, 1999
Lead-free tin-silver-based soldering alloy
MITSUI MINING & SMELTING CO14 citations69