IDiyas

For the Inventor, By the Inventor

Atsugi, Japan

Yohei Sakamaki

USPTO Granted Patents = 14



Average Co-Inventor Count = 6.1

ph-index = 4

Forward Citations = 46(Granted Patents)


Company Filing History:

goldMedal14 out of 5,289 
 
Nippon Telegraph and Telephone Corporation
 patents

Years Active: 2009-2024

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14 patents (USPTO):
1. 12181737 - Optical switching apparatus (2024-12-31),
2. 8971677 - Optical 90-degree hybrid circuit (2015-03-03),
3. 8737779 - Optical wavelength multi/demultiplexer (2014-05-27),
4. 8649640 - Optical 90-degree hybrid circuit (2014-02-11),
5. 8588560 - Optical 90-degree hybrid circuit (2013-11-19),
6. 8554040 - Planar lightwave circuit, design method for wave propagation circuit, and computer program (2013-10-08),
7. 8538222 - Planar lightwave circuit, design method for wave propagation circuit, and computer program (2013-09-17),
8. 8483525 - Optical wavelength multiplexing/demultiplexing circuit, optical module using optical wavelength multiplexing/demultiplexing circuit, and communication system (2013-07-09),
9. 8467635 - Optical modulator (2013-06-18),
10. 8463097 - Planar lightwave circuit, design method for wave propagation circuit, and computer program (2013-06-11),
11. 8150219 - Waveguide-type optical interferometer (2012-04-03),
12. 7899279 - Optical delay line interferometer (2011-03-01),
13. 7856163 - Planar lightwave circuit, design method for wave propagation circuit, and computer program (2010-12-21),
14. 7580597 - Optical functional circuit (2009-08-25),
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