3m Innovative Properties Company

Gregory G Jager

Eric O Hemberg

Douglas D Fletcher

Oscar M Hemberg

Jason T Lunn

Angela L Pan

Alonso M Hernandez

Michael F Weber

Andrew R Fox

Nicolas A Echeverri

Manoj Nirmal

Brian D Gale

Jacob T Lusson

Martin J Vos

Brenda M Bonney

Garin G Ipsen

Nicolas W Tremain

Anders P Hellberg

Edvard B E Mänsson

Edvard B E Maansson

Kelly R Potter

Henrik M Fransson

Abby R Lemon

Douglas W Fletcher

Marco D'Adamo

A powered room air purifier with a visual indicator of air quality, the visual indicator including: a reflector that defines a forwardly-open-ended reflecting cavity and that includes at least one through-opening in a floor or ceiling of the reflector; at least one diffuser layer that covers the forward opening of the forward-open-ended reflecting cavity; and, at least one LED light source that is positioned within the at least one through-opening, the LED light source and the reflector being configured so that the LED light source is shielded from line-of-sight view along a forward-rearward axis of the powered room air purifier.

Powered room air purifier with air-quality visual indicator

Voice masking headphone

Hearing protector

An electronic hearing protection device is provided. The electronic hearing protection device includes an amplifier and a speaker to relay sounds, such as conversations, to the user of the hearing protection. The hearing protection device provides adaptive gunshot recognition and suppression technology.

Adaptive electronic hearing protection device

Hearing protector headband

One aspect of the present disclosure directs to a switch circuit including an isolator circuit to allow detection of switch states of a multilevel light switch. Another aspect of the present disclosure directs to a lighting assembly containing light emitting diodes (LEDs) of different colors, where the lighting assembly produces light of different color depending on the switch state of a multilevel light switch.

Switch circuit for LED lighting assembly adaptive to multilevel light switches

A display system includes a reflective display panel and a light source tailored to enhance the color gamut of the system. The panel, which may be a Cholesteric liquid crystal display panel, includes an array of reflective pixels, each pixel comprising a first, second, and third subpixel of different first, second, and third colors. The light source illuminates a front of the display panel with source light to enable observers to view images formed by the panel. The light source includes a lamp and an enhancing element. The lamp, which may be a metal halide lamp, emits lamp light that includes the first, second, and third colors. The enhancing element may be an optical filter, a supplemental LED light source or other light source, or both. The enhancing element enhances the system color gamut, for example, by increasing the color gamut area relative to illumination with the lamp alone.

Reflective display system with enhanced color gamut

Growing community of inventors

Oakdale, MN, United States of America

Gregory G Jager