Kei Ichikawa
17Patents
5h-index
31Co-inventors
66Inventor score
Filing activity: Feb 7, 1992 → Oct 13, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5258879A | Tracking error detection circuit of magnetic recording and reproduction apparatus for determining tracking error based on pilot signals recorded on a recording meedium | Physics | 16 | Expired |
| US7657847B2 | Copy control information deciding apparatus | Electricity | 10 | Active |
| US5754356A | Tracking error detector with comparison of amplitude detected pilot signals leaking in from tracks adjacent to the target track | Physics | 6 | Expired |
| US5477398A | Apparatus for editing data in a selected area on a track of a tape recording medium | Physics | 5 | Expired |
| US5313338A | Editing device which selectively edits a section of a helical track | Physics | 5 | Expired |
| US5594602A | Tracking error detecting circuit | Physics | 3 | Expired |
| US8072778B2 | Plasma display device | Electricity | 2 | Active |
| US5371604A | Apparatus for edit recording of a compressed digital video signal on a recording tape | Physics | 2 | Expired |
| US11237644B2 | Character input device, character input method, and character input program stored on computer-readable storage medium | Physics | 1 | Active |
| US5455719A | Data recording method in which pilot signal period coincides with cumulative bit disparities of insert data | Physics | 1 | Expired |
| US10768713B2 | Character input device, character input method, and character input program | Physics | 0 | Active |
| US8077121B2 | Plasma display panel display device | Electricity | 0 | Active |
| US7940006B2 | Plasma display device | Electricity | 0 | Active |
| US11634180B2 | Vehicle body rear part structure | Performing Operations; Transporting | 0 | Active |
| US11640502B2 | Word registration device, word registration method, and word registration program stored on computer-readable storage | Physics | 0 | Active |
| US8189990B2 | Digital broadcast receiving apparatus, recording apparatus, method and system | Electricity | 0 | Active |
| US8014169B2 | Shield structure for electronic device | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.