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Patent applications and USPTO patent grants for TSUBAKI; KAZUNARI.The latest application filed is for "optical amplifier, optical transmission device, and optical transmission system".
Patent | Date |
---|---|
Optical Amplifier, Optical Transmission Device, And Optical Transmission System App 20210111800 - Nakata; Masao ;   et al. | 2021-04-15 |
Optical amplifier Grant 7,499,212 - Tsubaki March 3, 2 | 2009-03-03 |
Wavelength division multiplexed optical amplifier Grant 7,330,303 - Sato , et al. February 12, 2 | 2008-02-12 |
Optical amplifier App 20070064306 - Tsubaki; Kazunari | 2007-03-22 |
Wavelength division multiplexed optical amplifier App 20050078358 - Sato, Takashi ;   et al. | 2005-04-14 |
Apparatus and a method for locating a fault of a transmission line Grant 6,534,997 - Horishita , et al. March 18, 2 | 2003-03-18 |
High precision current output circuit Grant 5,892,402 - Tsubaki , et al. April 6, 1 | 1999-04-06 |
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