David L. Ausen

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Eagan, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Air supply attachment for a helmet
- Patent number D1057296
- Issue date Jan 7, 2025
- 3M Innovative Properties Company
- Benjamin A. Johnson
- D29 - Equipment for safety, protection, and rescue
Information Patent Grant
Air filtration device
- Patent number 9,358,409
- Issue date Jun 7, 2016
- 3M Innovative Properties Company
- David L. Ausen
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Radial blower with shaped scroll profile
- Patent number 8,667,960
- Issue date Mar 11, 2014
- 3M Innovative Properties Company
- David L. Ausen
- A42 - HEADWEAR

Patents Applicationslast 30 patents

Information Patent Application
HOOD FOR HARDHAT AND RESPIRATOR APPARATUS
- Publication number 20250221486
- Publication date Jul 10, 2025
- 3M Innovative Properties Company
- Benjamin A. Johnson
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Application
HARDHAT WITH SHAPED AIR CONDUIT
- Publication number 20250213895
- Publication date Jul 3, 2025
- 3M Innovative Properties Company
- Benjamin A. Johnson
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Application
HELMET-MOUNTED RESPIRATOR APPARATUS WITH A DUAL PLENUM SYSTEM
- Publication number 20130014751
- Publication date Jan 17, 2013
- 3M Innovative Properties Company
- David L. Ausen
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Application
AIR FILTRATION DEVICE
- Publication number 20130014752
- Publication date Jan 17, 2013
- David L. Ausen
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
RADIAL BLOWER WITH SHAPED SCROLL PROFILE
- Publication number 20110240026
- Publication date Oct 6, 2011
- 3M Innovative Properties Company
- David L. Ausen
- A62 - LIFE-SAVING FIRE-FIGHTING