Hearing Evaluation & Acoustic Research, Inc.

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Portland, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for testing acoustical attenuation of hearing protectors
- Patent number 4,060,701
- Issue date Nov 29, 1977
- Hearing Evaluation & Acoustic Research, Inc.
- John M. Epley
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Apparatus for testing acoustical attenuation of hearing protectors
- Patent number 4,020,298
- Issue date Apr 26, 1977
- Hearing Evaluation & Acoustic Research, Inc.
- John M. Epley
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

Trademarklast 30 trademarks

Information Trademark
72422282 - HEAR, INC.
- Serial number 72422282
- Registration number 968384
- Filing date Apr 24, 1972
- HEARING EVALUATION & ACOUSTIC RESEARCH,INC.
- 42 - Scientific and technological services and research and design relating thereto