Koichi Haga
45Patents
10h-index
44Co-inventors
75Inventor score
Filing activity: May 7, 1986 → Aug 9, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6838308B2 | Semiconductor polysilicon component and method of manufacture thereof | Chemistry; Metallurgy | 166 | Expired |
| US4969025A | Amorphous silicon photosensor with oxygen doped layer | Emerging Cross-Sectional Technologies | 63 | Expired |
| US6307996A | Optical waveguide device and manufacturing method thereof | Physics | 33 | Expired |
| US5403673A | Functional thin film member | Electricity | 24 | Expired |
| US5140397A | Amorphous silicon photoelectric device | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4980705A | Print recording head | Performing Operations; Transporting | 19 | Expired |
| US7262892B1 | Hologram reconstruction method and device | Physics | 16 | Active |
| US5153750A | Image reading apparatus having a contact type image sensor device | Electricity | 12 | Expired |
| US6336707B1 | Recording element and recording device | Performing Operations; Transporting | 11 | Expired |
| US6589362B2 | Zinc oxide semiconductor member formed on silicon substrate | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4792510A | Electrophotographic element with silicide treated porous Al.sub.2 O.sub.3 sublayer | Physics | 10 | Expired |
| US5953027A | Method and apparatus for redirecting propagating acoustic waves from a substrate to a slant face to cause ink-jetting of ink material | Performing Operations; Transporting | 9 | Expired |
| US5060041A | Amorphous silicon photosensor | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5155567A | Amorphous photoconductive material and photosensor employing the photoconductive material | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6936188B1 | Zinc oxide semiconductor material | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4734346A | Photosensitive material for electrophotography | Physics | 6 | Expired |
| US5283207A | Photoconductive material and photosensor employing the photoconductive material | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7511867B2 | Hologram reproduction method and apparatus | Physics | 4 | Active |
| US5917521A | Ink jet recording apparatus and method for jetting an ink droplet from a free surface of an ink material using vibrational energy | Performing Operations; Transporting | 4 | Expired |
| US5123975A | Single crystal silicon substrate | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7535609B2 | Hologram recording method and device | Physics | 3 | Active |
| US7535608B2 | Hologram recording method and hologram recording apparatus | Physics | 3 | Active |
| US7582392B2 | Hologram-recording material, hologram-recording medium, and hologram-recording method | Physics | 2 | Active |
| US7557970B2 | Hologram recording method, hologram recording device, hologram playback method, and optical recording medium | Emerging Cross-Sectional Technologies | 2 | Active |
| US7826324B2 | Data playback method and device for data recorded as a hologram | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.