Seiki Ejima
8Patents
3h-index
13Co-inventors
43Inventor score
Filing activity: Jun 29, 1998 → May 9, 2001
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6615614B1 | Method for preparing optical waveguide substrate | Physics | 43 | Expired |
| US6564585B2 | Method for producing a second-order nonlinear glass material | Physics | 16 | Expired |
| US6301412A | Apparatus and method for making multi-branching optical coupler | Physics | 6 | Expired |
| US6380109B1 | Second-order nonlinear glass material | Physics | 1 | Expired |
| US6681074B1 | Method for producing base material for optical fiber having deformed first clad, base material for optical fiber and optical fiber | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6701752B2 | Synthesized silica glass optical member and method for manufacturing the same | Chemistry; Metallurgy | 0 | Expired |
| US6436728B2 | Method for making an optical waveguide substrate | Chemistry; Metallurgy | 0 | Expired |
| US6402973B1 | Preparation of silicon substrate | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.