Koichi Maru
Inventor
Stats
- 4 US patents issued
- 4 US Applications filed
- most recent filing
This is official USPTO record data
Details
- 4 US Patents Issued
- 4 US Applications Filed
- 125 Total Citation Count
- Aug 2, 2001 Most Recent Filing
- Jun 3, 1998 Earliest Filing
Work History
| Patent Owner | Applications Filed | Year |
|---|---|---|
| KOKUSAI DENSHIN DENWA CO., LTD. | 1
| 1998
|
| HITACHI CABLE, LTD. | 2
1 2 | 1998
2000 2001 |
Inventor Addresses
| Address | Duration |
|---|---|
| Hitachi, JP | Apr 15, 03 - Apr 29, 03 |
| Ibaraki, JP | May 30, 00 - Jan 09, 03 |
Technology Profile
| Technology | Matters | |
|---|---|---|
| G02B: | OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS | 3 |
| H04J: | MULTIPLEX COMMUNICATION | 1 |
Patents / Publication
| Patents / Publication # | Year of Publication / Issued | Title | Citations |
|---|---|---|---|
| 6556749 | 2003 | Array waveguide grating and method of manufacture thereof | 11 |
| 6549696 | 2003 | Optical wavelength multiplexer/demultiplexer | 19 |
| 2003/0007,728 | 2003 | Array waveguide grating and method of manufacture thereof | 3 |
| 6317534 | 2001 | Optical wavelength routing device | 1 |
| 6069990 | 2000 | Optical wavelength multiplexer/demultiplexer | 59 |
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