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Patent applications and USPTO patent grants for De Leeuw; Jan.The latest application filed is for "constant gas flow regulating device".
Patent | Date |
---|---|
Constant gas flow regulating device Grant 6,761,185 - De Leeuw July 13, 2 | 2004-07-13 |
Device for dosing a liquid preparation Grant 5,679,111 - Hjertman , et al. October 21, 1 | 1997-10-21 |
Diluting and agitating device Grant 4,046,515 - de Leeuw September 6, 1 | 1977-09-06 |
Apparatus for removing liquid from the inside of a test tube Grant 4,012,200 - DE Leeuw March 15, 1 | 1977-03-15 |
Photometer chamber unit Grant 3,881,826 - De Leeuw May 6, 1 | 1975-05-06 |
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