Motorola Corporation

Google Inc.

Steven Duane Pratt

Sivakumar Muthuswamy

Ronald James Kelley

Robert W Pennisi

Bobby Dean Landreth

James L Davis

Rudy Yorio

Robert J Mulligan

Glenn F Urbish

Andrzej T Guzik

Yesenia V Escorcia

David L Ellis, Ii

Gene Kim

William H Robertson, Jr

Robert L Leon

Thomas J Swirbel

Andreas R Haase

William B Mullen, Iii

John K Arledge

David S Fredley

Anupama Ramamurthy

Shawn P Welsh

Kevin J Pieper

Kevin S Olcott

Lara J Martin

Andrew T Guzik

Mark D Newton

Kimberly A Williams

Brian H Lee

Roger K Callanan

Philip J Hill

Jorge I Rodriquez

A method of and fuel cell system for limiting an amount of a fuel crossing over a membrane in a fuel cell, the method including determining an appropriate molecular ratio of the fuel and water for a fuel-water mixture; and controlling an amount of the fuel-water mixture that is available to an anode side of the membranein the fuel cell according to an amount of the fuel that will be electro-oxidized by the fuel cell. The fuel cell system includes a fuel cell membranehaving an anode layer, a cathode layer, and an electrolyte layerwhere the cathode layer is exposed to an oxygen source, and a fuel delivery systemincluding a fuel chamberdisposed around and proximate to the anode layer at a side opposite to the electrolyte layer, the fuel delivery system implementing the method above.

Method and device for limiting crossover in fuel cell systems

Wireless router

A gas pressure regulator () includes a mechanical primary stage (), preferably including a spring valve, and an electronic secondary stage (), preferably including a micromachined pressure regulator, the combination of the mechanical primary stage and the electronic secondary stage suitable for relatively precise low pressure near zero flow rates with reasonable energy consumption rates, such as encountered when supplying fuel to a low power fuel cell system.

Two-stage hybrid gas pressure regulator

Tracking device

Devices () with embedded control programs are provided are provided with RF-ID devices () or other non-contact read data carriers () that provide configuration data, on which the execution of the embedded control programs is contingent. Preferred embodiments include wireless communication devices () provided with RF-ID devices () or set of magnets () that encodes data embedded in front fascia. Embodiments of the invention increase the security of configuration data, and allow for functionality to enhanced by replacing the front fascia.

Wireless communication device with tamper resistant configuration settings

A fuel cell () includes a membrane electrode assembly () located together with a layer of variable porosity porous gas diffusion material (). The variable porosity gas diffusion material layer () operates to selectively limit the amount of reactants reaching localized areas of the membrane electrode assembly () in order to reduce hot spots.

Fuel cell using variable porosity gas diffusion material

A fuel cell () includes a membrane electrode assembly () located together with a layer of porous, z-axis electrically conductive, non-linear positive temperature coefficient (NPTC) material (). The NPTC material () operates to selectively limit the amount of electrons collected from localized areas of the membrane electrode assembly () in order to reduce hot spots.

Fuel cell using non-linear positive temperature coefficient material

A fuel cell power source () for use in electronic systems includes a fuel cell system () and a controller (). The controller () computes net power requirements of a load device from one or more power functional information sources; and determines an operating point of the fuel cell system () by matching the net power requirements with the power characteristics of the fuel cell system ().

Method of operating a fuel cell power source

A direct methanol fuel cell systemuses dissolved catalyst to promote a fuel cell reaction that takes place in an anode sub-chamberof a fuel cellAccording to the preferred embodiment the dissolved catalyst comprises a macro cyclic coordinated compound of platinum. The dissolved catalyst is preferably continuously circulated through the anode sub-chamberand is preferably mixed in a mixing valvewith methanol and water in order to promote its catalytic action.

Fuel cell system

A method for humidifying a fuel stream for a direct methanol fuel cell. An ultrasonic transducer () is used to create a vapor of methanol without heating. Water is also vaporized with an ultrasonic transducer () to create a vapor of water without heating. The water vapor and the methanol vapor are combined () in a certain ratio to form a humidified fuel vapor which is presented to an anode () of the direct methanol fuel cell (). The ratio of water to methanol can be adjusted automatically by a sensor () that monitors the current drawn by the load () on the fuel cell.

Method for humidifying a fuel stream for a direct methanol fuel cell

A fuel cell device has a composite particle electrode () formed using particles () having a combination of ion conductor material, electron conductor material, and catalyst material. Each composite particle () is preferably formed to have a substantially spherical outer layer () of ion conductor material () with conductive and catalyst particles () are dispersed throughout the outer layer (). An array of composite particles () is layered in a substantially structured or ordered manner on a membrane support structure () to form the fuel cell electrode. A fuel cell electrode so formed has interstitial gaps between the composite particles that result in a structure permeable to oxygen and other fluids.

Fuel cell having porous electrodes and method for forming same

Rewritable signs () that include bistable cholesteric liquid crystal layers () are provided. According to one embodiment a rewritable sign () is devoid of circuitry for establishing electric fields in localize regions for writing information to the rewritable sign (), and is consequently inexpensive. In the latter embodiment, a separate information writer () that includes an array of pixel electrodes () that is driven by an active matrix () is used to write information on the rewritable sign. According to another embodiment a rewritable sign () includes three cholesteric liquid layers () each of which reflects a different primary color. The three cholesteric liquid crystal layers () are interleaved with sets of conductive lines () that are used to apply signals to the cholesteric liquid crystal layers () for the purpose of writing information.

Rewritable sign system

A small fuel cell () powers a portable electronic device () and contains a fuel reservoir () and a device () that measures the amount of liquid fuel () that is in the reservoir. The fuel cell operates on hydrogen that is obtained from a liquid hydrocarbon fuel, such as alcohol or other hydrocarbons. The liquid fuel is typically converted into hydrogen by a reforming process. The reservoir that is connected to the fuel cell has an indicia () that is readable by a human user of the portable electronic device, for measuring the amount of liquid hydrocarbon fuel that is present in the reservoir. Typically, the indicia consist of a sight glass, a capacitive element, a resistive element, a transparent portion of the reservoir, a float, or an acoustic transmitter coupled with an acoustic receiver.

Means for measuring the liquid level in a reservoir for a fuel cell

An electronic device () is provided with a plurality of activatable indicia () that are located proximate keys buttons () that are used to control the communication device (). The activatable indicia () are activated in order to identify to a user one or more of the buttons () to be pressed in order to in the course of entering a command, or to indicate to the user to reorient an antenna of the electronic device in order to improve signal strength.

Electronic device with improved user interface

Growing community of inventors

Ft. Lauderdale, FL, United States of America

Steven Duane Pratt