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Patent applications and USPTO patent grants for Howson; Leslie Lawrence.The latest application filed is for "drainage system".
Patent | Date |
---|---|
Drainage system Grant 10,704,248 - Howson | 2020-07-07 |
Drainage System App 20190119897 - Howson; Leslie Lawrence | 2019-04-25 |
Drainage system Grant 10,190,305 - Howson Ja | 2019-01-29 |
Drainage outlet Grant D811,558 - Howson February 27, 2 | 2018-02-27 |
Drainage System App 20180030713 - Howson; Leslie Lawrence | 2018-02-01 |
Waste outlet Grant D657,848 - Howson April 17, 2 | 2012-04-17 |
Drainage pipe covering kit for use during building or floor construction Grant 6,799,606 - Howson October 5, 2 | 2004-10-05 |
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