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Patent applications and USPTO patent grants for Umemura; Tokihiro.The latest application filed is for "optical voltage sensor".
Patent | Date |
---|---|
Optical voltage sensor Grant 8,829,890 - Takahashi , et al. September 9, 2 | 2014-09-09 |
Phase modulator, phase modulator assembly, and photosensor Grant 8,319,958 - Sasaki , et al. November 27, 2 | 2012-11-27 |
Optical voltage transformer Grant 8,115,473 - Sato , et al. February 14, 2 | 2012-02-14 |
Optical Voltage Sensor App 20110234202 - Takahashi; Masao ;   et al. | 2011-09-29 |
Phase Modulator, Phase Modulator Assembly, And Photosensor App 20100315621 - Sasaki; Kinichi ;   et al. | 2010-12-16 |
Optical Voltage Transformer App 20100109642 - Sato; Junichi ;   et al. | 2010-05-06 |
Power control device with electric double layer capacitor unit cells Grant 6,812,591 - Umemura , et al. November 2, 2 | 2004-11-02 |
Electrical double-layer capacitor App 20040017647 - Okamoto, Tetsushi ;   et al. | 2004-01-29 |
Power control device with electric double layer capacitor unit cells App 20020017822 - Umemura, Tokihiro ;   et al. | 2002-02-14 |
Partial discharge detecting device for electrical equipments Grant 5,075,629 - Umemura , et al. December 24, 1 | 1991-12-24 |
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