David M. Chenal

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Frederic, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Earpiece-foam sizing apparatus and method
- Patent number 11,826,231
- Issue date Nov 28, 2023
- JMJ Holdings, LLC
- David M. Chenal
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Apparatus and method for an earpiece device
- Patent number 11,229,552
- Issue date Jan 25, 2022
- JMJ Holdings, LLC
- David M. Chenal
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Sound-attenuation system
- Patent number 11,179,273
- Issue date Nov 23, 2021
- JMJ Holdings, LLC
- David M. Chenal
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Sound attenuation apparatus and method
- Patent number 10,940,043
- Issue date Mar 9, 2021
- JMJ Holdings, LLC
- David M. Chenal
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Sound attenuation
- Patent number 9,603,746
- Issue date Mar 28, 2017
- JMJ Holdings, LLC
- David M. Chenal
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Information Patent Application
EARPIECE-FOAM SIZING APPARATUS AND METHOD
- Publication number 20230058747
- Publication date Feb 23, 2023
- JMJ Holdings, LLC
- David M. Chenal
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
SOUND-ATTENUATION SYSTEM
- Publication number 20210186762
- Publication date Jun 24, 2021
- JMJ Holdings, LLC
- David M. Chenal
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
SOUND ATTENUATION APPARATUS AND METHOD
- Publication number 20180133061
- Publication date May 17, 2018
- JMJ Holdings, LLC
- David M. Chenal
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Application
SOUND ATTENUATION
- Publication number 20160302974
- Publication date Oct 20, 2016
- JMJ Holdings, LLC
- David M. Chenal
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE