Hiroyuki Ishikawa
148Patents
16h-index
188Co-inventors
89Inventor score
Filing activity: Oct 26, 1983 → Aug 16, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5554338A | Method of preparing composite sintered body | Performing Operations; Transporting | 47 | Expired |
| US5493345A | Method for detecting a scene change and image editing apparatus | Physics | 40 | Expired |
| US6201896A | Picture encoding apparatus | Electricity | 37 | Expired |
| US5818473A | Drive method for an electrostatic ink jet head for eliminating residual charge in the diaphragm | Performing Operations; Transporting | 32 | Expired |
| US6070310A | Method for producing an ink jet head | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5853451A | Ultrafine spherical nickel powder for use as an electrode of laminated ceramic capacitors | Emerging Cross-Sectional Technologies | 25 | Expired |
| US6371598B1 | Ink jet recording apparatus, and an ink jet head | Performing Operations; Transporting | 21 | Expired |
| US6474784B1 | Ink-jet head, ink jet printer, and its driving method | Performing Operations; Transporting | 21 | Expired |
| US6600835B1 | Moving-picture compressing technique | Electricity | 20 | Expired |
| US5444683A | Optical reporting reproducing device having fixed and movable optical systems | Physics | 19 | Expired |
| US4857365A | Method of manufacturing modified wood material | Performing Operations; Transporting | 19 | Expired |
| US6494555B1 | Ink ejecting device | Performing Operations; Transporting | 18 | Expired |
| US6350003B1 | Ink droplet ejecting method and apparatus | Performing Operations; Transporting | 18 | Expired |
| US6897638B2 | Stabilized power supply unit having a current limiting function | Emerging Cross-Sectional Technologies | 17 | Expired |
| US6168263A | Ink jet recording apparatus | Performing Operations; Transporting | 17 | Expired |
| US5571305A | Atomized steel powder excellent machinability and sintered steel manufactured therefrom | Chemistry; Metallurgy | 16 | Expired |
| US5565762A | DC/DC converter and audio device incorporating the same | Electricity | 16 | Expired |
| US5143748A | Timber surface improving treatment process | Electricity | 14 | Expired |
| US5709764A | Method for assembling a disc-shaped recording medium | Emerging Cross-Sectional Technologies | 14 | Expired |
| US6254213A | Ink droplet ejecting method and apparatus | Performing Operations; Transporting | 13 | Expired |
| US6257685A | Ink droplet ejecting method and apparatus | Performing Operations; Transporting | 13 | Expired |
| US7121626B2 | Headrest lock structure with lock slots, method for forming lock slots in headrest pole and method for producing headrest pole | Performing Operations; Transporting | 13 | Expired |
| US6257686A | Ink droplet ejecting method and apparatus | Performing Operations; Transporting | 12 | Expired |
| US6822428B2 | Stabilized power supply unit having a current limiting function | Physics | 12 | Expired |
| US6748114B1 | Moving picture encoding method and moving picture encoding apparatus | Electricity | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.