3m Innovative Properties Company

Minnesota Mining and Manufacturing Company

Thales Dis France Sa

Michael Alan Meis

Audrey A Sherman

Kevin R Schaffer

John C Schultz

Gordon D Henson

William J Bryan

Ellen O Aeling

Robert L Brott

Nicholas A Lee

John Allen Wheatley

Martin Kristoffersen

Marie A Boulos

Nicolas A Echeverri

Thu-Van T Tran

Erik A Aho

Mieczyslaw H Mazurek

David Scott Thompson

Ronald S Steelman

Patrick Rene Destain

Steven D Solomonson

Eric O Hemberg

John R David

Douglas D Fletcher

Jayant Chakravarty

Oscar M Hemberg

Daniel W Hennen

Jonathan B Arthur

Andrew John Ouderkirk

Martin B Wolk

Mikhail L Pekurovsky

Raymond Patrick Johnston

Rolf W Biernath

Matthew S Stay

Zhaohui Yang

Joseph Andrew Hoffman

David G Freier

David Jon Lundin

Michael J Sykora

Scott Anthony Igl

Encai Hao

Paul Edward Humpal

Hung Thien Tran

Barbara A DeBaun

Matthew T Scholz

Terry Lee Smith

Patrick R Fleming

Alonso M Hernandez

Wendi J Winkler

Robert F Kamrath

Patrick A Thomas

Brian D Gale

Peter T Benson

Michele A Craton

Charles N DeVore

James F Poch

Michael F Weber

William Ward Merrill

Kenneth A Epstein

Scott D Gullicks

Caroline M Ylitalo

Richard A Patterson

Douglas Scott Dunn

Donald Kent Larson

Philip Edwin Watson

Craig R Schardt

Jacob Moskovich

Bruce R Broyles

Tao Liu

Kevin D Landgrebe

John C Nelson

Glenn E Casner

James R Bylander

Vivian Wynne Jones

Charles David Hoyle

William A Tolbert

Jeffrey Robert Janssen

Ravi Palaniswamy

Maureen Ann Kavanagh

Dale L Ehnes

Thomas R Corrigan

Patrick J Hager

Arlin Lee Weikel

Richard L Simmons

Glen O Gregerson

Thomas R Hoffend, Jr

James B Carpenter

Corinne Elizabeth Lipscomb

Brett A Howell

Robert W Shannon

Michael E Griffin

Maria A Appeaning

Robert D Lorentz

Shannon D Scott

Martin J Vos

Phillip E Tuma

Brian W Lueck

David L Hofeldt

Narina Y Stepanova

Anthony J Sabelli

Kenneth A P Meyer

An air filter includes filter media, a sensor, and circuitry coupled to the sensor, the circuitry configured to receive data from the sensor representative of the condition of the filter media and wirelessly transmit such data. The data may be received by a device with a display to use the information to present an indication of the filter media condition to a user.

Air filter condition sensing

Devices, systems and methods for obtaining data representative of the condition of an air filter media of an air filter installed in a powered air-handling system, and for using such data to present an indication of the air filter media condition to a user. The devices, systems and methods use pressure information representative of at least a downstream pressure of the powered air-handling system.

Systems and methods for monitoring the status of air filters are provided. One or more thermoelectric sensors are provided to have an upstream sensing surface positioned adjacent the inlet surface of the air filter, and a downstream sensing surface positioned adjacent the outlet surface of the air filter. Sensing circuitry are connected to the thermoelectric sensors, configured to receive signals from the thermoelectric sensors and process the signals to obtain status information of the air filter.

Air filtration monitoring based on thermoelectric devices

Display screen with graphical user interface

Monitoring device

A non-contact friction ridge capture device is described. The device comprises a device housing, the device housing including an electronics compartment and an illumination shield, with an opening between the electronics compartment and the illumination shield into which a user can insert the user's hand. The device further comprising a camera disposed in the electronics compartment for capturing an image of at least one friction ridge surface on a user's hand. The device further comprises a light source disposed in the electronics compartment, the light source emitting light in the direction of the illumination shield, wherein the peak wavelength of emitted light is in the range of 440 to 570 nanometers (nm). The user's hand is not required to contact the device when the camera captures the image of at least one friction ridge surface on a user's hand.

Non-contact friction ridge capture device

Filter-borne sensor housing

This application describes a back-lit transmissive display including a transmissive display and a variable index light extraction layer optically coupled to a lightguide. The variable index light extraction layer has first regions of nanovoided polymeric material and second regions of the nanovoided polymeric material and an additional material. The first and second regions are disposed such that for light being transported at a supercritical angle in the lightguide, the variable index light extraction layer selectively extracts the light in a predetermined way based on the geometric arrangement of the first and second regions. The transmissive display may be a transmissive display panel or a polymeric film such as a graphic.

Back-lit transmissive display having variable index light extraction layer

Growing community of inventors

Stillwater, MN, United States of America

Michael Alan Meis