Michael R Bizak

US Patent:

20070072169, Mar 29, 2007

Filed:

Sep 29, 2005

Appl. No.:

11/238470

Inventors:

Kia Peyvan - Seattle WA, US
Michael Bizak - Kirkland WA, US
COLIN CAMPBELL - SEATTLE WA, US
RAND LEE - KIRKLAND WA, US

International Classification:

C12M 1/34
C12Q 1/00

US Classification:

435004000, 435287200, 205777500

Abstract:

There is disclosed a process and apparatus for reading electrical current of electrodes on a microarray of electrodes. Those electrodes having binding events are detected by a difference in electrical current flow. Enzymes on targets catalyze the conversion of substrate to product, which is detectable by electrochemical reduction at each electrode on the microarray of electrodes. The apparatus has an integration circuit that provides a voltage output that is measured and recorded over time and used to calculate an average current flow. A potentiometer equalizes voltage at electrodes undergoing measurement compared to grounded electrodes.

US Patent:

63109603, Oct 30, 2001

Filed:

Oct 7, 1999

Appl. No.:

9/413680

Inventors:

Elric W. Saaski - Bothell WA
Boone B. Owens - Wrightsville Beach NC
Michael Bizak - Kirkland WA
Stefano Passerini - Minneapolis MN

Assignee:

Research International, Inc. - Woodinville WA

International Classification:

H04R 2500

US Classification:

381323

Abstract:

A contactless rechargeable hearing aid system in which a rechargeable hearing aid may be optically or inductively recharged by an optical or an inductive recharger. The optically rechargeable hearing aid may have a dual purpose optical fiber that may act as a light conduit for the recharging light, and that may also act as a draw string for the hearing aid. The rechargeable hearing aid may use a high energy nickel metal-hydride rechargeable battery or a high energy, high voltage lithium based rechargeable battery, in conjunction with a DC to DC voltage regulating circuit for converting the rechargeable battery's declining DC output voltage to the fixed DC input voltage needed by the hearing aid's audio related circuitry. The DC to DC voltage regulating circuit may also help to present a supply impedance that matches the input impedance of the audio related circuitry in the hearing aid. The rechargeable battery may have an alternately folded cell stack, a spiral wound cell stack or an accordion folded cell stack, in order to provide, in a minimized volume, the large anode, cathode and electrolyte areas that may be needed to reduce the rechargeable battery's output impedance, in order to help reduce internal resistance losses during use of the battery.