DANIEL ALEX BAKER
Pilots at Saint Davids Rd, Hopkins, MN

5326011, Jul 5, 1994

Jan 22, 1993

8/007601

Donald V. Mager - Mendota Heights MN
Daniel A. Baker - Minnetonka MN

Printware, Inc. - St. Paul MN

B41J 1500

226181

A web of material, typically paper, metal or film and most commonly roll photographic plate material, passes between a first, driven, roller made from material with a high coefficient of friction, typically neoprene rubber, and a second, driven, roller made from material with a low coefficient of friction, typically metal or nylon. The high-friction drive roller (only) is positionally adjustable. The web is driven straight ahead, without appreciable undesirable steering or skew, over a broad range of adjustments of the separation, and the parallelism, between the two rollers. The web motion is responsive substantially to only the high-friction drive roller, and the web speed may accordingly be regulated, including so as to be maintained highly uniform, in response to the drive roller (only).

RE33119, Nov 28, 1989

Mar 7, 1988

7/168525

Daniel A. Baker - Minnetonka MN

Whirlpool Corporation - Benton Harbor MI

G01K 300, G01K 724, G06F 1520

374102

A method and apparatus is disclosed for determining the temperature to which a thermistor is exposed. A capacitor is charged through a reference resistor and the length of time required to charge the capacitor to a predetermined level is measured to obtain a reference charge time. The capacitor is discharged, and then charged through the thermistor and the length of time required to charge the capacitor to the predetermined level through the thermistor is measured to obtain a temperature charge time. The temperature to which the thermistor is exposed is determined by computing the difference between the reference charge time and the temperature charge time divided by the sum of the times.

4721123, Jan 26, 1988

Oct 23, 1986

6/922205

Louis C. Cosentino - Wayzata MN
Daniel A. Baker - Minnetonka MN
Edward J. Mikolajczyk - Minneapolis MN
Russel L. Hoeker - Maple Grove MN
Jo-Ann B. Maltais - Minneapolis MN

Minntech Corporation - Minneapolis MN

B08B 304, B08B 900, B08B 1102

134 57R

A machine for reprocessing catheters of the type having a double lumen, one of which leads to a balloon. A used catheter is sealed within a cassette which in turn is connected by multiple ports to a cleaning side of the machine. Cleaning solution is flushed through the inside and outside of the catheter. The balloon integrity is tested by adding step wise volume additions and monitoring the pressure. The data generated is compared to a standard curve for new catheters. The cleaned, sterile catheter is then rinsed to remove all traces of sterilant. Sterile saline is alternatively flushed through the cassette and catheter. The balloon is again tested for leaks. No portion of the rinse side of the machine requires sterilizing except for the disposable tubing set and saline source. The rinsed, clean and sterile catheter is removed from the cassette for reuse.

5270004, Dec 14, 1993

May 11, 1992

7/844620

Louis C. Cosentino - Plymouth MN
Jeffrey A. Lee - Plymouth MN
Daniel A. Baker - Minnetonka MN

Minntech Corporation - Plymouth MN

A61M 114

422 46

A compact, cylindrical integrated blood heater/oxygenator in which the blood flows transversely to the axial direction of hollow heat exchange and oxygenation fibers. Blood enters a longitudinally extending central chamber of the blood heater/oxygenator, and moves radially through annular hollow heat exchange and oxygenation fiber bundles in a direction generally perpendicular to the axis of the device and generally transverse to the axial direction of the fibers. The blood proceeds toward the outer wall of the oxygenator where the temperature is adjusted and oxygenated blood is collected and passed out of the oxygenator through an exit port.

4906581, Mar 6, 1990

Oct 20, 1988

7/260448

Daniel A. Baker - Minnetonka MN
Louis C. Cosentino - Plymouth MN
LeRoy J. Fischbach - Plymouth MN
Robert T. Hall - Welch MN
Anatol M. Hnojewyj - Minneapolis MN
Scott R. Vagle - Blaine MN
Perry L. Blackshear - Mahtomedi MN

Minntech Corporation - Minneapolis MN

G01N 2520

436147

A method for non-destructive testing for approximation of oxygen transmission in hollow fiber blood oxygenators or the like is provided which method includes passing a first fluid at a predetermined temperature and volume flow rate through the hollows of the fibers and a second fluid at a second predetermined input temperature and volume flow rate across the outside of the fibers and measuring the heat rise or fall of the fluids and comparing the results with standards for a given blood oxygenator device.

5578267, Nov 26, 1996

Aug 4, 1995

8/511287

Louis C. Cosentino - Plymouth MN
Jeffrey A. Lee - Plymouth MN
Daniel A. Baker - Minnetonka MN

Minntech Corporation - Minneapolis MN

A61M 114

422 46

A combination heat exchanger and oxygenator device is provided. The device includes a generally cylindrical housing having first and second compartments with hollow heat exchange tubes and hollow gas exchange tubes disposed therein, a blood inlet, a blood outlet, a heat exchanges medium inlet, a heat exchange medium outlet, an oxygenating fluid inlet and an oxygenating fluid outlet. The housing has a central axis with the second compartment being concentric thereto. The blood flow passage is defined by blood entering the device generally axially through a path extending along the central axis of the housing and flows generally radially through the second, oxygenating compartment.

5137531, Aug 11, 1992

Jan 23, 1990

7/449962

Jeffrey A. Lee - New Hope MN
Louis C. Cosentino - Plymouth MN
Perry L. Blackshear - Mahtomedi MN
Daniel A. Baker - Minnetonka MN

Minntech Corporation - Minneapolis MN

A61M 114

422 46

A device having a blood oxygenator and heat exchanger of the outside perfusion type. The blood oxygenator employs a tightly packed, crisscrossing bundle of gas permeable hollow fibers. The heat exchanger employs a bundle of polyurethane, liquid impermeable hollow tubes. A center divider facilitates two separate compartments and allows control over pack densities within each compartment while allowing blood to move in a planar manner throughout the device.

RE36774, Jul 11, 2000

Apr 24, 1997

8/842528

Louis C. Cosentino - Deephaven MN
Jeffrey A. Lee - Plymouth MN
Daniel A. Baker - Minnetonka MN

Baxter Healthcare Corporation - Irvine CA

A61M 114

422 46

A combination heat exchanger and oxygenator device is provided. The device includes a generally cylindrical housing having first and second compartments with hollow heat exchange tubes and hollow gas exchange tubes disposed therein, a blood inlet, a blood outlet, a heat exchanges medium inlet, a heat exchange medium outlet, an oxygenating fluid inlet and an oxygenating fluid outlet. The housing has a central axis with the second compartment being concentric thereto. The blood flow passage is defined by blood entering the device generally axially through a path extending along the central axis of the housing and flows generally radially through the second, oxygenating compartment.