Osami Okada
13Patents
11h-index
15Co-inventors
65Inventor score
Filing activity: Nov 10, 1981 → Feb 13, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4579623A | Method and apparatus for surface treatment by plasma | Electricity | 595 | Expired |
| US4543465A | Microwave plasma source having improved switching operation from plasma ignition phase to normal ion extraction phase | Performing Operations; Transporting | 83 | Expired |
| US4901667A | Surface treatment apparatus | Chemistry; Metallurgy | 63 | Expired |
| US4433228A | Microwave plasma source | Electricity | 33 | Expired |
| US4633138A | Ion implanter | Physics | 31 | Expired |
| US4658143A | Ion source | Electricity | 23 | Expired |
| US5108543A | Method of surface treatment | Electricity | 23 | Expired |
| US4801847A | Charged particle accelerator using quadrupole electrodes | Electricity | 21 | Expired |
| US4769540A | Atmospheric pressure ionization mass spectrometer | Electricity | 17 | Expired |
| US4735777A | Instrument for parallel analysis of metabolites in human urine and expired air | Physics | 15 | Expired |
| US4863671A | Plasma confinement system | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4629930A | Plasma ion source | Electricity | 3 | Expired |
| USRE35681E | Atmospheric pressure ionization mass spectrometer | General | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.