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Patent applications and USPTO patent grants for OIWA; Tadao.The latest application filed is for "raw water treatment method".
Patent | Date |
---|---|
Raw Water Treatment Method App 20170107122 - MIMURA; Hitoshi ;   et al. | 2017-04-20 |
Upper-layer cleaning device for water treatment device, and method for cleaning water treatment device filter layer Grant 9,573,082 - Mimura , et al. February 21, 2 | 2017-02-21 |
Cleaning System For Sand Filtration Layer App 20150314221 - INUI; Masaki ;   et al. | 2015-11-05 |
Upper-layer Cleaning Device For Water Treatment Device, And Method For Cleaning Water Treatment Device Filter Layer App 20140190907 - Mimura; Hitoshi ;   et al. | 2014-07-10 |
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