Eiji Ishikawa
25Patents
9h-index
53Co-inventors
78Inventor score
Filing activity: Sep 14, 1984 → May 31, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6521538B2 | Method of forming a trench with a rounded bottom in a semiconductor device | Electricity | 84 | Expired |
| US5888834A | Immunoassay plate and use thereof | Emerging Cross-Sectional Technologies | 75 | Expired |
| US6090718A | Dry etching method for semiconductor substrate | Emerging Cross-Sectional Technologies | 58 | Expired |
| US4657853A | Immunoassays utilizing covalent conjugates of polymerized enzyme and antibody | Emerging Cross-Sectional Technologies | 37 | Expired |
| US6482701B1 | Integrated gate bipolar transistor and method of manufacturing the same | Electricity | 23 | Expired |
| US5618120A | Recording apparatus having means for detecting the positions of a recording medium | Performing Operations; Transporting | 19 | Expired |
| US5236849A | Method of high sensitivity immunoassay | Physics | 18 | Expired |
| US6797588B2 | Method for manufacturing a semiconductor device having a trench and a thick insulation film at the trench opening | Electricity | 16 | Expired |
| US6063564A | Circulation thin layer liquid phase assay | Physics | 15 | Expired |
| US5236830A | Method of assay for antigen | Emerging Cross-Sectional Technologies | 8 | Expired |
| US7251072B2 | Optical transmission system | Electricity | 6 | Expired |
| US7684713B2 | Phase control apparatus and optical DQPSK receiver | Electricity | 4 | Active |
| US7312918B2 | Optical transmission system having function of correcting noise light due to Raman amplification | Electricity | 3 | Expired |
| US9407396B2 | Wavelength multiplexing apparatus and method | Electricity | 2 | Active |
| US6765707B2 | Variable slit width device for spectroscope | Physics | 2 | Expired |
| US5137807A | Method for determining beta-subunit of human prolyl 4-hydroxylase by immunoassay to detect hepatic disease | Emerging Cross-Sectional Technologies | 1 | Expired |
| US7541257B2 | Semiconductor device having three-dimensional construction and method for manufacturing the same | Emerging Cross-Sectional Technologies | 1 | Active |
| US9810135B2 | Cooling fan device for vehicle | Mechanical Engineering; Lighting; Heating | 1 | Active |
| US7586672B2 | Optical transmission system | Electricity | 1 | Active |
| US11597992B2 | Ni-based thermal spraying alloy powder and method for manufacturing alloy coating | Performing Operations; Transporting | 0 | Active |
| US10637564B2 | Transmission apparatus, transmission system, and transmission method | Electricity | 0 | Active |
| US9388474B2 | Method for detecting toxin-producing Clostridium difficile | Chemistry; Metallurgy | 0 | Active |
| US11597009B2 | Ni—Fe base alloy powder, and method for producing alloy coating using said Ni—Fe base alloy powder | Emerging Cross-Sectional Technologies | 0 | Active |
| US6750965B2 | Mirror supporting structure for monochromator | Physics | 0 | Expired |
| US7642194B2 | Method for etching and apparatus for etching | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.