Iwao Ohwada
58Patents
11h-index
35Co-inventors
78Inventor score
Filing activity: Jun 25, 1997 → Mar 29, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6690344B1 | Method and apparatus for driving device and display | Physics | 199 | Expired |
| US5862275A | Display device | Emerging Cross-Sectional Technologies | 46 | Expired |
| US7307383B2 | Electron emitter and method of producing the same | Electricity | 31 | Expired |
| US6452583B1 | Display-driving device and display-driving method | Physics | 25 | Expired |
| US6211853A | Optical waveguide display with voltage-modulated controlled movable actuators which cause light leakage in waveguide at each display element to provide gradation in a display image | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6323833A | Optical waveguide display with movable actuators which cause light leakage in waveguide at each display elements to provide gradation in a display image by temporal subfield modulation | Physics | 19 | Expired |
| US6281868A | Display | Physics | 16 | Expired |
| US6226080A | Method for detecting defect of transparent body, method for producing transparent body | Physics | 16 | Expired |
| US6666658B2 | Microfluidic pump device | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US6434028B1 | DC to DC converter | Electricity | 12 | Expired |
| US6483492B1 | Display-driving device and display-driving method performing gradation control based on a temporal modulation system | Physics | 12 | Expired |
| US6682318B2 | Pump | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US6528925B1 | Piezoelectric/electrostrictive element driving circuit | Electricity | 10 | Expired |
| US9431067B2 | Volatile memory backup system including all-solid-state battery | Emerging Cross-Sectional Technologies | 8 | Active |
| US7071628B2 | Electronic pulse generation device | Electricity | 7 | Expired |
| US6897620B1 | Electron emitter, drive circuit of electron emitter and method of driving electron emitter | Electricity | 7 | Expired |
| US7109962B2 | Display device | Electricity | 6 | Expired |
| US7176609B2 | High emission low voltage electron emitter | Electricity | 6 | Expired |
| US6476336B1 | Current controlling element | Electricity | 6 | Expired |
| US6508411B1 | Method of driving liquid-drop spraying device | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US6565331B1 | Pump | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US7187114B2 | Electron emitter comprising emitter section made of dielectric material | Electricity | 5 | Expired |
| US7379037B2 | Display apparatus, method of driving display apparatus, electron emitter, method of driving electron emitter, apparatus for driving electron emitter, electron emission apparatus, and method of driving electron emission apparatus | Electricity | 5 | Expired |
| US6946800B2 | Electron emitter, method of driving electron emitter, display and method of driving display | Electricity | 4 | Expired |
| US6549437B1 | Voltage converter | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.