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Nppon Telegraph and Telephone Corporation
Chiyoda--ku, Tokyo, JP
| Nppon Telegraph and Telephone Corporation Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20090263084 | ARRAYED WAVEGUIDE GRATING CIRCUIT - Two AWG circuits are integrated while preventing degradation in quality of a multiplexing/demultiplexing function. An arrayed waveguide grating circuit includes: a first slab waveguide ( | 10-22-2009 |