3m Innovative Properties Company

Eric O Hemberg

Douglas D Fletcher

Oscar M Hemberg

Alonso M Hernandez

Nicolas A Echeverri

Mario A Davenport

Gregory G Jager

Michael Alan Meis

Jayant Chakravarty

Daniel W Hennen

Jonathan B Arthur

Dennis M Glass

Lyle L Luppes

Karl W Bloedorn

Gene B Portelli

Brenda M Bonney

Jason T Lunn

Garin G Ipsen

Lindsay J Adams

Angela L Pan

Jacob T Lusson

Anders P Hellberg

Marco D'Adamo

Edvard B E Mänsson

Edvard B E Maansson

Kelly R Potter

Henrik M Fransson

Douglas W Fletcher

Michael A Meis

Voice masking headphone

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.

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

A hearing protection apparatus is provided. The apparatus comprises a removable compressible pad having a top portion and a bottom portion wherein the compressible pad is configured to be secured to the headband when the apparatus is worn. The compressible pad can provide increased comfort and an improved fit to the user.

Comfort headband for hearing protectors

Growing community of inventors

Hong Kong, China

Eric O Hemberg