MARK D JOHNSON, MD
Medical Practice in Phoenix, AZ

6019580, Feb 1, 2000

Feb 23, 1998

9/028146

Lawrence D. Barr - Tempe AZ
Frederick G. Borns - Chandler AZ
Mark C. Johnson - Phoenix AZ

AlliedSignal Inc. - Morris Township NJ

B63H 116

416219R

A turbine or compressor disk assembly comprises a plurality of blades attached to a central hub by means of the blade root of each blade engaging a corresponding slot in the hub. According to the principles of the present invention, a turbine or compressor disk assembly includes one or more locally bulging regions extending axially away from the surface of the disk in the vicinity of the bottom contact plane of the disk attachment firtree. The locally bulging regions reduce the peak Macke stress in the disk bottom fillet and blade attachment root. In an illustrative embodiment, two locally bulging regions are incorporated into the disk and the corresponding blades, one of which extends forward from the leading edge of the disk and the other of which extends rearward from the trailing edge of the disk. The rearward locally bulging region has an exaggerated extension which allows the stress reduction ring to form an aft flow discourager as well as functioning to reduce peak stress.

5874182, Feb 23, 1999

Sep 29, 1997

8/939673

David P. Wilkinson - North Vancouver, CA
Mark C. Johnson - Phoenix AZ
Kevin M. Colbow - North Vancouver, CA
Stephen A. Campbell - Coquitlam, CA

Ballard Power Systems Inc. - Burnaby

H01M 810

429 30

In an electrochemical fuel cell, a sufficient quantity of catalyst, effective for promoting the reaction of reactant supplied to an electrode, is disposed within the volume of the electrode so that a reactant introduced at a first major surface of the electrode is substantially completely reacted upon contacting the second major surface. Crossover of reactant from one electrode to the other electrode through the electrolyte in an electrochemical fuel cell is thereby reduced.

5997244, Dec 7, 1999

Feb 27, 1998

9/032618

Yoseph Gebre-Giorgis - Phoenix AZ
Mark C. Johnson - Phoenix AZ
Michael J. Kolodziej - Phoenix AZ
Daniel M. Voron - Gilbert AZ
Bruce D. Wilson - Gilbert AZ

AlliedSignal Inc. - Morris Township NJ

F01D 508

415115

A gas turbine engine cooling airflow pickup and delivery system which radially inwardly traverses the torque transmittal path of the compressor section at a relatively large radius location, then extends substantially farther inwardly to a significantly smaller radius location, all with minimal static pressure loss to the cooling airflow. Pressurized, substantially non-swirling air from the compressor stage is supplied to a collector, and from the collector thru pickup holes arranged at an angle of 45 degrees reversely to the direction of rotation of the shaft. The pressurized air is then lead into a vortex spoiler which has a plurality of blades smoothly curved reversely to the direction of rotation of the shaft, the radially outer end of each blade being inclined in matching relation to the pickup holes.

2012021, Aug 23, 2012

Nov 17, 2011

13/299135

Michael M. Selzer - Wayzata MN, US
Mark C. Johnson - Phoenix AZ, US
Erik N.K. Cressman - Lake Elmo MN, US

A61B 18/04

606 27

A thermochemical ablation system can be used to ablate a portion of a bodily structure, such as a human airway. In some examples, the thermochemical ablation system includes a first ablation reagent, a second ablation reagent, and an expandable balloon positioned adjacent the distal end of a catheter. The expandable balloon can be inserted into the bodily structure and the two ablation reagents combined to cause an exothermic reaction that generates heat. The heat may create a substantially uniform temperature distribution across the surface of the expandable balloon, providing substantially uniform ablation of tissue adjacent the balloon.