Yu Du

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Blacksburg, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Sound-attenuating earmuff having isolated double-shell structure
- Patent number 7,854,294
- Issue date Dec 21, 2010
- Adaptive Technologies, Inc.
- Yu Du
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Sound-attenuating earmuff having isolated double-shell structure
- Patent number 7,703,572
- Issue date Apr 27, 2010
- Adaptive Technologies, Inc.
- Yu Du
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Double hearing protection device
- Patent number 7,457,428
- Issue date Nov 25, 2008
- Adaptive Technologies, Inc.
- Michael A. Vaudrey
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Noise canceling microphone system and method for designing the same
- Patent number 7,245,726
- Issue date Jul 17, 2007
- Adaptive Technologies, Inc.
- Yu Du
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
SOUND-ATTENUATING EARMUFF HAVING ISOLATED DOUBLE-SHELL STRUCTURE
- Publication number 20100218775
- Publication date Sep 2, 2010
- Yu Du
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
SOUND-ATTENUATING EARMUFF HAVING ISOLATED DOUBLE-SHELL STRUCTURE
- Publication number 20080128198
- Publication date Jun 5, 2008
- Yu Du
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Double hearing protection device
- Publication number 20080025524
- Publication date Jan 31, 2008
- Adaptive Technologies, Inc.
- Michael A. Vaudrey
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Attenuating foam insert and method for manufacture
- Publication number 20050126845
- Publication date Jun 16, 2005
- Michael A. Vaudrey
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
Noise canceling microphone system and method for designing the same
- Publication number 20050031136
- Publication date Feb 10, 2005
- Yu Du
- H04 - ELECTRIC COMMUNICATION TECHNIQUE