Keiichi Okada
20Patents
8h-index
33Co-inventors
75Inventor score
Filing activity: Sep 11, 1991 → Aug 3, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8736909B2 | Image forming apparatus and computer readable medium | Electricity | 128 | Active |
| US5199017A | Optical disk drive and method for counting the number of tracks on an optical disk | Physics | 28 | Expired |
| US5261986A | Method of fabricating ceramic laminated electronic component | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5488468A | Optical distance measuring apparatus having semiconductor position sensitive photodetector | Physics | 19 | Expired |
| US5519483A | Detection system and detection method of document size for use in a document reader | Physics | 13 | Expired |
| US5255253A | Apparatus and method for controlling the velocity of a disk storage head | Physics | 11 | Expired |
| US5384762A | Focusing servo in an optical disk drive | Physics | 10 | Expired |
| US5693933A | Device for dtecting the size of an original document in a document reader | Electricity | 10 | Expired |
| USRE36864E | Optical disk drive and methods for counting the number of tracks on an optical disk | General | 8 | Expired |
| US5350007A | Injection apparatus for a hot-chamber die-cast machine | Performing Operations; Transporting | 4 | Expired |
| US9201338B2 | Image forming apparatus, non-transitory computer readable medium, and image forming method | Physics | 2 | Active |
| US11990154B1 | Seek time to the beginning position of data on tape media | Physics | 1 | Active |
| US9360802B2 | Image forming apparatus | Physics | 0 | Active |
| US12249350B2 | Methods for improving track density in dual-reel removable tape devices and fixed tape devices | Physics | 0 | Active |
| US12106772B2 | Methods for increasing storage capacity and improving performance in dual-reel removable tape devices and fixed tape devices | Physics | 0 | Active |
| US8699083B2 | Image processing device, image forming device, and computer-readable medium | Electricity | 0 | Active |
| US8711434B2 | Image processing device, image forming apparatus, and non-transitory computer readable recording medium | Electricity | 0 | Active |
| US8358444B2 | Image forming apparatus capable of printing a copy-forgery pattern | Electricity | 0 | Active |
| US8659796B2 | Image forming apparatus and image forming program | Electricity | 0 | Active |
| US9250554B2 | Image processing apparatus, image processing method, and non-transitory computer readable medium | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.