Calgary
Canada
6
2018-05-10
The entities that hold a legal rights for patent applications filed by inventor Lee Douglas Walker:
Douglas Walker Lee from Calgary, CA has applied for patents for these inventions. The list has both pending applications and granted patents:
Gas flotation tank
#2 | 2018-05-10Filter backwash nozzle
#3 | 2016-11-24Filter backwash nozzle
#4 | 2016-07-28Gas flotation tank
#5 | 2016-02-11Phase separation tank
#6 | 2015-02-26Gas flotation tank
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