Extended duct with damping for improved speaker performance
US-9107003-B2 · Aug 11, 2015 · US
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Johnson Martin E patents in 2015
Johnson Martin E was listed as an assignee on 2 patent publications in 2015.
| Metric | Value |
|---|---|
| Company | Johnson Martin E |
| Year | 2015 |
| Patents | 2 |
Patents
Representative publications for Johnson Martin E in 2015.
Near-field null and beamforming
US-9020163-B2 · Apr 28, 2015 · US
Top CPC classifications
Most common classification codes for Johnson Martin E in 2015.
| CPC | Patents |
|---|---|
| H04R2499/15 | 2 |
| H04R1/02 | 1 |
| H04R1/2873 | 1 |
| H04R1/288 | 1 |
| H04R2410/01 | 1 |
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