Extended duct with damping for improved speaker performance
US-9107003-B2 · Aug 11, 2015 · US
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Johnson Martin E patents
Johnson Martin E holds 2 patents in our database, with recent filings and technology areas summarized below.
| Metric | Value |
|---|---|
| Total patents | 2 |
| Recent patents | 0 |
| First publication | Apr 28, 2015 |
| Latest publication | Aug 11, 2015 |
Filing trend
Year-over-year patent counts for this assignee.
Not enough yearly data to assess filing trend yet.
| Year | Patents |
|---|---|
| 2015 | 2 |
| Year | Patents |
|---|---|
| 2015 | 2 |
Recent patents
Latest publications where this party is an assignee.
Near-field null and beamforming
US-9020163-B2 · Apr 28, 2015 · US
Notable patents
Representative or frequently cited publications from precomputed assignee stats.
Extended duct with damping for improved speaker performance
US-9107003-B2 · Aug 11, 2015 · US
Near-field null and beamforming
US-9020163-B2 · Apr 28, 2015 · US
Top CPC classifications
Most common classification codes in this portfolio.
| CPC | Patents |
|---|---|
| H04R2499/15 | 2 |
| H04R2410/01 | 1 |
| H04R3/005 | 1 |
| H04R5/027 | 1 |
| H04R1/288 | 1 |
Technology areas
Mapped technology topics for this assignee.
| Technology | Patents |
|---|---|
| Electricity | 2 |