Ryuji Ninomiya
8Patents
5h-index
14Co-inventors
52Inventor score
Filing activity: Jun 1, 1990 → Feb 22, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5658528A | Lead-free solder | Chemistry; Metallurgy | 16 | Expired |
| US5911949A | Abrasion resistant copper alloy | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5718868A | Lead-free tin-zinc-based soldering alloy | Performing Operations; Transporting | 8 | Expired |
| US5958333A | Tin-silver-based soldering alloy | Chemistry; Metallurgy | 6 | Expired |
| US6103976A | Wire and cable for use in robot | Electricity | 5 | Expired |
| US5993736A | Lead-free tin-silver-based soldering alloy | Performing Operations; Transporting | 5 | Expired |
| US6531003B2 | Abrasion resistant copper alloy, copper alloy powder for build-up cladding, and engine cylinder head | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US5093098A | Method of controlling water/hydrogen isotopic exchange reaction plant | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.