VIRTUAL CORPORATION

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PORTLAND, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Real-time hearing aid simulation
- Patent number 5,386,475
- Issue date Jan 31, 1995
- Virtual Corporation
- Jonathan D. Birck
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Acoustic admittance measuring apparatus with wide dynamic range and...
- Patent number 4,966,160
- Issue date Oct 30, 1990
- Virtual Corporation
- Jonathan D. Birck
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

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