23 patents currently held

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

The next term ends in Sep 2034. from the record

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Alerts on its grants, lapses and transfers.

Ending by 2030

Sep 2034

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

202620272028202920302031203220332034 20352036203720382039204020412042204320442045

notable patents fee due within 90 days all others Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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

Audio Signal Processing Method and Apparatus US 9,832,585

Cited by 40 later US patents, top 10% of utility patents granted in 2017 in our data, and renewed at every maintenance window due so far. Protection runs to 2035.

Ends Mar 2035 · High confidence Also notable

Method for Generating Filter for Audio Signal, and Parameterization Device for Same US 9,832,589

Cited by 35 later US patents, top 10% of utility patents granted in 2017 in our data, and renewed at every maintenance window due so far. Protection runs to 2034. A terminal disclaimer is on file and its reference is not resolved, so no cap is applied and the date may move earlier, never later.

Ends no later than Dec 2034 · Medium confidence Also notable

Audio Signal Processing Method and Device US 9,986,365

Cited by 23 later US patents, top 25% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2035.

Ends Apr 2035 · High confidence

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 Dec 11 to 27, 2026 · next Dec 11
2 fees due Apr 1 to 22, 2027 · next Apr 1
2 fees due May 5, 2027

Which patents, and when each one lapses · Pro

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

What they patent

The 5 largest of its 6 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Audio Signal Processing Method and Apparatus	6 in force	to Mar 2035
Method for Generating Filter for Audio Signal, and Parameterization Device for Same	6 in force	to Dec 2034
Audio Signal Processing Method and Device	4 in force	to Apr 2035
Method and Apparatus for Processing Multimedia Signals	3 in force	to Sep 2034
Method and Apparatus for Processing Audio Signals	2 in force	to Sep 2034

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 9,578,437	Method and Apparatus for Processing Audio Signals held by Wilus Institute of Standards and Technology Inc. and Gcoa Co., Ltd. In force Ends no later than Sep 17, 2034 · Medium confidence	In force	Ends no later than Sep 17, 2034	Medium confidence
US 9,584,943	Method and Apparatus for Processing Audio Signals held by Wilus Institute of Standards and Technology Inc. and Gcoa Co., Ltd. In force Term ends Sep 17, 2034 · High confidence	In force	Term ends Sep 17, 2034	High confidence
US 9,961,469	Method and Device for Audio Signal Processing held by Wilus Institute of Standards and Technology Inc. and Gcoa Co., Ltd. In force Term ends Sep 17, 2034 · High confidence	In force	Term ends Sep 17, 2034	High confidence
US 10,455,346	Method and Device for Audio Signal Processing held by Wilus Institute of Standards and Technology Inc. and Gcoa Co., Ltd. In force Term ends Sep 17, 2034 · High confidence	In force	Term ends Sep 17, 2034	High confidence
US 10,469,969	Method and Apparatus for Processing Multimedia Signals held by Wilus Institute of Standards and Technology Inc. and Gcoa Co., Ltd. In force Term ends Sep 17, 2034 · High confidence	In force	Term ends Sep 17, 2034	High confidence
US 11,096,000	Method and Apparatus for Processing Multimedia Signals held by Wilus Institute of Standards and Technology Inc. and Gcoa Co., Ltd. In force Term ends Sep 17, 2034 · High confidence	In force	Term ends Sep 17, 2034	High confidence
US 11,622,218	Method and Apparatus for Processing Multimedia Signals held by Wilus Institute of Standards and Technology Inc. and Gcoa Co., Ltd. In force Term ends Sep 17, 2034 · High confidence	In force	Term ends Sep 17, 2034	High confidence
US 9,832,589	Method for Generating Filter for Audio Signal, and Parameterization Device for Same held by Wilus Institute of Standards and Technology Inc. and Gcoa Co., Ltd. In force Ends no later than Dec 23, 2034 · Medium confidence	In force	Ends no later than Dec 23, 2034	Medium confidence
US 10,158,965	Method for Generating Filter for Audio Signal, and Parameterization Device for Same held by Wilus Institute of Standards and Technology Inc. and Gcoa Co., Ltd. In force Term ends Dec 23, 2034 · Medium confidence	In force	Term ends Dec 23, 2034	Medium confidence
US 10,433,099	Method for Generating Filter for Audio Signal, and Parameterization Device for Same held by Wilus Institute of Standards and Technology Inc. and Gcoa Co., Ltd. In force Term ends Dec 23, 2034 · Medium confidence	In force	Term ends Dec 23, 2034	Medium confidence

10 of 23 patents shown.

Pro members see all 23.

Pro members: see all 23 patents

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.

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Gcoa Co., Ltd.