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System and method for concurrently conducting cause-and-effect experiments on content effectiveness and adjusting content distribution to optimize business objectives |
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2000-08-08 |
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1998-04-14 |
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Composite membranes for solid phase extractions and reactions |
Donald F. Hagen, Paul E. Hansen |
1997-06-17 |
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Composite membranes for solid phase extractions and reactions |
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1997-06-03 |
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Method of isolating an analyte using a solid phase extraction medium |
James S. Fritz, Philip J. Dumont, Donald F. Hagen, Luther W. Schmidt |
1997-04-08 |
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Self-wettable solid phase extraction medium |
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1997-04-01 |
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Particle-loaded nonwoven fibrous article for separations and purifications |
Donald F. Hagen, Paul E. Hansen, Nicholas R. Baumann |
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Composite membranes for solid phase extractions and reactions |
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1996-06-25 |
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Donald F. Hagen, Louis C. Haddad, Robert E. Perkins |
1995-11-28 |
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Particle-loaded nonwoven fibrous article for separations and purifications |
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1995-05-16 |
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1995-04-04 |
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Composite reactive articles for the determination of cyanide |
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1994-08-23 |
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Particle-loaded nonwoven fibrous article for separations and purifications |
Donald F. Hagen, Paul E. Hansen, Nicholas R. Baumann |
1994-07-12 |
| 5279742 |
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Article for separations and purifications and method of controlling porosity therein |
Donald F. Hagen, William V. Balsimo, Robin E. Wright |
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Method of making a controlled pore composite polytetrafluoroethylene |
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1991-12-10 |