Keiji Tsukada
45Patents
16h-index
28Co-inventors
81Inventor score
Filing activity: Jun 22, 1989 → Mar 30, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5132012A | Liquid chromatograph | Physics | 145 | Expired |
| US6269262A | Biomagnetic field measuring apparatus | Human Necessities | 76 | Expired |
| US6665553B2 | Biomagnetic field measuring apparatus using squid magnetometers for evaluating a rotational property of a current in a subject | Human Necessities | 70 | Expired |
| US6522908B1 | Biomagnetic field measuring apparatus | Human Necessities | 58 | Expired |
| US6815949B2 | Apparatus for measuring a magnetic field | Human Necessities | 42 | Expired |
| US6230037A | Biomagnetic field measuring method and apparatus | Physics | 41 | Expired |
| US5344545A | Electrolytic sensor for measuring the content of gas in a fluid | Performing Operations; Transporting | 35 | Expired |
| US6681131B2 | Apparatus for measuring bio-magnetic fields | Human Necessities | 25 | Expired |
| US7525308B2 | Magnetic detecting device and material identifying device | Physics | 22 | Expired |
| US5250168A | Integrated ion sensor | Physics | 21 | Expired |
| US6853185B2 | Magnetic field measurement system | Physics | 20 | Expired |
| US5102525A | Planar oxygen sensor | Physics | 19 | Expired |
| US6462540B1 | Magnetic field measuring apparatus which enables external magnetic noise cancellation | Emerging Cross-Sectional Technologies | 18 | Expired |
| US7403809B2 | Biomagnetic field measuring method and apparatus | Physics | 17 | Expired |
| US6711281B2 | Method of measuring a biomagnetic field, method of analyzing a measured biomagnetic field, and method of displaying biomagnetic field data, and apparatus therefor | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6539245B2 | Biomagnetic field measuring method and apparatus | Physics | 16 | Expired |
| US7193413B2 | Magnetic field measurement apparatus | Physics | 16 | Expired |
| US6735460B2 | Biomagnetic field measuring method and apparatus | Physics | 15 | Expired |
| US6628978B1 | Biomagnetism measurement device and method of biomagnetism measurement using the device | Human Necessities | 15 | Expired |
| US6473518B1 | Method of measuring a biomagnetic field, method of analyzing a measured biomagnetic field, method of displaying biomagnetic field data, and apparatus therefor | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5352352A | Carbonic acid gas sensor | Physics | 13 | Expired |
| US7340289B2 | Biomagnetic field measuring apparatus | Human Necessities | 13 | Expired |
| US6275719A | Biomagnetic field measurement apparatus | Human Necessities | 13 | Expired |
| US7400984B2 | Biomagnetic measurement apparatus | Human Necessities | 12 | Active |
| US6665552B2 | Gradiometer integrating pickup coils and magnetic field measurement system | Physics | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.