174 patents currently held
24 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
The next term ends in Dec 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
87
Ending by 2030
Dec 2026
Next term end
160
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Mar 2030 · High confidence
Also notable
Ends Aug 2028 · High confidence
Also notable
Ends Dec 2026 · High confidence
Phase-Amplitude 3-D Stereo Encoder and Decoder
US 8,712,061
Cited by 228 later US patents, top 5% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2030.
System and method for searching, storing, and rendering digital media content using virtual broadcast channels
US 9,219,634
Cited by 56 later US patents, top 10% of utility patents granted in 2015 in our data, and renewed at every maintenance window due so far. Protection runs to 2028.
Transient Detection and Modification in Audio Signals
US 8,321,206
Renewed at every maintenance window since the 2012 grant; no more fees are due before its term ends in 2026.
Formerly held, still cited
Notable
Ends Sep 2038 · High confidence
Cited by 48 later US patents, top 5% of utility patents granted in 2019 in our data. Protection runs to 2038.
now held by Zeica Labs Pte. Ltd.
Also notable
Ends Feb 2037 · High confidence
Cited by 28 later US patents, top 10% of utility patents granted in 2020 in our data. Protection runs to 2037.
now held by Zeica Labs Pte. Ltd.
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 2 fees due Nov 21 to 26, 2026 · next Nov 21
- 2 fees due Jan 21 to 28, 2027 · next Jan 21
- 4 fees due Feb 4, 2027
- 1 fee due May 5, 2027The maintenance fee for System, Sound Processing Apparatus and Sound Processing Method for Electronic Games (US 10,469,048) comes due May 5, 2027. Unpaid by Nov 5, 2027, it lapses early.
- 3 fees due Jun 1 to 22, 2027 · next Jun 1
- 4 fees due Jul 5 to 26, 2027 · next Jul 5
- 3 fees due Sep 8 to 24, 2027 · next Sep 8
- 2 fees due Oct 2 to 5, 2027 · next Oct 2
- 1 fee due Nov 10, 2027The maintenance fee for Novel Efficient Digital Microphone Decimation Filter Architecture (US 9,337,805) comes due Nov 10, 2027. Unpaid by May 10, 2028, it lapses early.
Recent changes
- 3 of the patents on this record were granted since Aug 16, 2026
- 2 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 160 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Spatial Audio Coding Based on Universal Spatial Cues | 10 in force | to Jul 2031 |
| Chair System with an Untethered Chair with Speakers | 2 in force | to Dec 2040 |
| Sound Device | 2 in force | to Apr 2036 |
| Method for spatially processing multichannel signals, processing module, and virtual surround-sound systems | 2 in force | to May 2031 |
| Alias-Free Subband Processing | 2 in force | to Nov 2029 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,457,484 | Method and Device to Process Digital Media Streams In force · High confidence | In force | High confidence | |
| US D672,747 | Speaker In force · High confidence | In force | High confidence | |
| US 8,321,206 | Transient Detection and Modification in Audio Signals In force · High confidence | In force | High confidence | |
| US 7,646,400 | Method and Apparatus for Forming a Panoramic Image In force · High confidence | In force | High confidence | |
| US D675,595 | Headphone In force · High confidence | In force | High confidence | |
| US D675,614 | Electronic Reader Device In force · High confidence | In force | High confidence | |
| US D678,253 | Microphone Sleeve In force · High confidence | In force | High confidence | |
| US D680,517 | Speaker In force · High confidence | In force | High confidence | |
| US D681,010 | Speaker In force · High confidence | In force | High confidence | |
| US 10,034,114 | Method for spatially processing multichannel signals, processing module, and virtual surround-sound systems In force · High confidence | In force | High confidence |
Also on record, not counted in the 174: 24 patents in force now held by others · 205 patents ended · 10 applications pending · 93 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.