Junichiro Ichikawa
58Patents
6h-index
56Co-inventors
75Inventor score
Filing activity: Sep 30, 1994 → Apr 29, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5526448A | Optical waveguide modulator having a reduced D.C. drift | Physics | 23 | Expired |
| US6218658A | Optical fuse | Physics | 11 | Expired |
| US7260280B2 | Optical device | Physics | 11 | Active |
| US8737773B2 | Optical control element | Physics | 9 | Active |
| US7310453B2 | Optical modulator | Physics | 9 | Expired |
| US7899338B2 | Method and device for controlling bias of optical modulator | Physics | 9 | Active |
| US6233385A | Light limiter | Physics | 6 | Expired |
| US6134372A | Light intensity attenuator and attenuating method | Physics | 6 | Expired |
| US7444039B2 | Optical modulator | Physics | 5 | Active |
| US8644647B2 | Optical control device | Physics | 5 | Active |
| US9946100B2 | Waveguide type optical element | Physics | 5 | Active |
| US10088734B2 | Waveguide-type optical element | Physics | 5 | Active |
| US7362924B2 | Optical modulator | Physics | 5 | Active |
| US7869668B2 | Method for generating carrier residual signal and its device | Electricity | 4 | Expired |
| US7689067B2 | Nested modulator | Physics | 4 | Active |
| US9519200B2 | Optical control device | Physics | 4 | Active |
| US6539153B2 | Light limiter | Physics | 4 | Expired |
| US7764422B2 | THz wave generation device | Electricity | 4 | Active |
| US7174059B2 | Optical device | Physics | 4 | Expired |
| US8396334B2 | Optical waveguide device | Physics | 3 | Active |
| US7831122B2 | Optical control device and manufacturing method thereof | Physics | 3 | Active |
| US8669121B2 | Method for forming polarization reversal | Emerging Cross-Sectional Technologies | 2 | Active |
| US7873244B2 | Light control device | Physics | 2 | Active |
| US7768696B2 | THZ wave generator | Physics | 2 | Expired |
| US10365534B2 | Optical waveguide device | Physics | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.