Hirokazu Ichikawa
34Patents
7h-index
45Co-inventors
69Inventor score
Filing activity: Feb 11, 1981 → Nov 3, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6356692B1 | Optical module, transmitter, receiver, optical switch, optical communication unit, add-and-drop multiplexing unit, and method for manufacturing the optical module | Electricity | 26 | Expired |
| US4358769A | Loop antenna apparatus with variable directivity | Electricity | 19 | Expired |
| US5870142A | Image sensor, image reading device, and image reading method | Electricity | 15 | Expired |
| US5028547A | Manufacture of a color image sensor | Electricity | 15 | Expired |
| US6292346A | Equipment for holding a semiconductor wafer, a method for manufacturing the same, and a method for using the same | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4951130A | Color filter structure of color image sensor | Electricity | 10 | Expired |
| US6919974B1 | Image reading device, image reading method, and light source for the same | Electricity | 8 | Expired |
| US6593968B1 | Linear image sensor, image reading device, and charge transfer method | Electricity | 7 | Expired |
| US7531789B2 | Image processing apparatus, image reading device, and image forming device | Electricity | 6 | Active |
| US6580528B1 | Image reading device | Electricity | 6 | Expired |
| US5675425A | Color image reading device having an optical element for creating double images | Electricity | 6 | Expired |
| US7724402B2 | Image reader | Electricity | 6 | Active |
| US7397565B2 | Device and method for obtaining appearance information | Physics | 5 | Active |
| US7154641B2 | Image scanning apparatus | Electricity | 4 | Expired |
| US7920300B2 | Image-input device | Electricity | 4 | Active |
| US6499650B2 | Solder dross removal apparatus and method | Performing Operations; Transporting | 3 | Expired |
| US7821670B2 | Image processing apparatus, image reading apparatus, image forming apparatus, and methods therefor | Electricity | 3 | Active |
| US5337474A | Process for fabricating electronic devices and image sensor | Emerging Cross-Sectional Technologies | 2 | Expired |
| US8446646B2 | Light guide and image reading apparatus | Physics | 2 | Active |
| US8186563B2 | Automatic soldering device and carrier device | Electricity | 2 | Active |
| US7905382B2 | Wave soldering tank | Performing Operations; Transporting | 2 | Active |
| US7988030B2 | Wave soldering bath | Performing Operations; Transporting | 1 | Expired |
| US7336431B2 | Image reading device and image forming device | Physics | 1 | Expired |
| US7643183B2 | Imaging apparatus | Electricity | 1 | Active |
| US10606545B2 | Display apparatus, scanner, and non-transitory computer readable medium | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.