Seigo Ando
32Patents
12h-index
38Co-inventors
81Inventor score
Filing activity: Apr 23, 1974 → Jan 20, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6920166B2 | Thin film deposition method of nitride semiconductor and nitride semiconductor light emitting device | Electricity | 247 | Expired |
| US4716366A | Eddy current distance signal apparatus with temperature change compensation means | Physics | 34 | Expired |
| US4742298A | Apparatus for detecting surface flaw of pipeline by electromagnetic induction | Physics | 27 | Expired |
| US5512821A | Method and apparatus for magnetically detecting defects in an object with compensation for magnetic field shift by means of a compensating coil | Physics | 26 | Expired |
| US3997835A | Method and apparatus for measuring distance | Physics | 24 | Expired |
| US5151793A | Recording medium playing apparatus | Electricity | 22 | Expired |
| US4647854A | Apparatus for measuring the level of the molten metal in the mold of a continuous casting machine | Performing Operations; Transporting | 20 | Expired |
| US4095469A | Temperature measuring apparatus | Physics | 20 | Expired |
| US5537038A | Magnetic flux measuring method and apparatus for detecting high frequency components of magnetic flux with high speed orientation | Physics | 19 | Expired |
| US4030027A | Apparatus for non-contact measurement of distance from a metallic body using a detection coil in the feedback circuit of an amplifier | Physics | 17 | Expired |
| US4186792A | Apparatus for monitoring and controlling the level of the molten metal in the mold of a continuous casting machine | Performing Operations; Transporting | 15 | Expired |
| US4567435A | Method and apparatus for continuously measuring distance utilizing eddy current and having temperature difference influence elimination | Physics | 12 | Expired |
| US4309902A | Method for continuously measuring steepness of defective flatness of metal strip during rolling | Physics | 11 | Expired |
| US4019131A | Method and apparatus for measuring the shape of the wavy edges of metal strips using a detection coil controlled to track the strip edge | Physics | 11 | Expired |
| US5132608A | Current measuring method and apparatus therefor | Physics | 11 | Expired |
| US4303883A | Apparatus for detecting the center of a welded seam in accordance with fundamental harmonic component suppression | Physics | 11 | Expired |
| US4267508A | Apparatus for non-contact measurement of distance from a metallic body using a detection coil in the feedback circuit of an amplifier | Electricity | 10 | Expired |
| US5357198A | Apparatus for magnetic inspection using magnetic shield | Physics | 9 | Expired |
| US5287059A | Saturable core magnetometer with a parallel resonant circuit in which the W3 DC level changes with a change in an external magnetic field | Physics | 9 | Expired |
| US7557387B2 | Avalanche photodiode | Electricity | 7 | Expired |
| US5502382A | Apparatus for magnetic inspection using magnetic shield, with specific relation of distance E between magnetic sensors and distance L between each magnetic sensor and the object to be inspected, to obtain optimum S/N | Physics | 5 | Expired |
| US5235275A | Magnetic inspection apparatus for thin steel strip having magnetizer and detection coil within a hollow roller rotated by the steel strip | Physics | 4 | Expired |
| US8575650B2 | Avalanche photodiode | Electricity | 4 | Active |
| US3946307A | Apparatus for detecting the physical properties of magnetic or electric conductive heat-responsive or deformable material using negative input impedance network | Physics | 4 | Expired |
| US4050011A | Eddy current flaw detector using a pair of parallel resonant circuits and a negative resistance in parallel with each circuit | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.