The record carries a change of name to this company from OKI Semiconductor Co., Ltd., 1,760 recordings between Dec 8, 2011 and May 14, 2020. That name keeps its own page for the records filed under it.
603 patents currently held
40 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 Nov 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
149
Ending by 2030
Nov 2026
Next term end
474
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 Aug 2037 · High confidence
Also notable
Ends Nov 2032 · High confidence
Also notable
Ends May 2031 · High confidence
Output Signal Generation Circuit
US 11,009,904
A family of 6 related applications built on the 2021 grant. Protection runs to 2037. A terminal disclaimer caps this term to an earlier patent's.
Charging Control System and Device
US 8,729,850
The largest patent family in this portfolio, 5 related applications, renewed at 3 of 3 maintenance windows. Protection runs to 2032.
Semiconductor Device and Method for Manufacturing Semiconductor Device
US 8,963,246
The largest patent family in this portfolio, 5 related applications, renewed at 3 of 3 maintenance windows. Protection runs to 2031.
Formerly held, still cited
Notable
Ends Sep 2030 · High confidence
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 2030.
now held by Taiwan Semiconductor Manufacturing Company, 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.
- 5 fees due Nov 21 to 30, 2026 · next Nov 21
- 16 fees due Dec 4 to 30, 2026 · next Dec 4
- 8 fees due Jan 9 to 30, 2027 · next Jan 9
- 16 fees due Feb 4 to 28, 2027 · next Feb 4
- 15 fees due Mar 5 to 29, 2027 · next Mar 5
- 13 fees due Apr 1 to 30, 2027 · next Apr 1
- 8 fees due May 5 to 28, 2027 · next May 5
- 9 fees due Jun 1 to 29, 2027 · next Jun 1
- 6 fees due Jul 2 to 26, 2027 · next Jul 2
- 15 fees due Aug 2 to 25, 2027 · next Aug 2
- 11 fees due Sep 3 to 30, 2027 · next Sep 3
- 9 fees due Oct 5 to 21, 2027 · next Oct 5
- 5 fees due Nov 10 to 12, 2027 · next Nov 10
Recent changes
- 2 of the patents on this record were granted since Aug 16, 2026
- 40 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 474 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Equalizer and Equalization Method | 17 in force | to Jun 2034 |
| Spread Spectrum Demodulator Employing Frequency Detection | 8 in force | to Jul 2032 |
| Semiconductor Device and Measurement Device Having an Oscillator | 6 in force | to May 2033 |
| Semiconductor Device Fabrication Method and Semiconductor Device | 5 in force | to Dec 2033 |
| Charging Control System and Device | 5 in force | to Nov 2032 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,405,995 | Semiconductor Storage Device In force · High confidence | In force | High confidence | |
| US 7,781,836 | Soi Semiconductor Device and Method of Manufacturing Thereof In force · High confidence | In force | High confidence | |
| US 7,446,414 | Semiconductor Device In force · High confidence | In force | High confidence | |
| US 7,477,679 | Spread Spectrum Demodulator Employing Frequency Detection In force · High confidence | In force | High confidence | |
| US 7,365,670 | Digital-To-Analog Converter In force · High confidence | In force | High confidence | |
| US 7,602,326 | Digital-To-Analog Converter Having Resistor String with Ranges to Reduce Circuit Elements In force · High confidence | In force | High confidence | |
| US 7,453,316 | Amplifier Circuit In force · High confidence | In force | High confidence | |
| US 7,372,390 | Analog-Digital Converter Circuit In force · High confidence | In force | High confidence | |
| US 7,558,681 | Method of Determining Plant Species with Pyrolysis-Gas Chromatography In force · High confidence | In force | High confidence | |
| US 7,508,242 | Driving Circuit That Eliminates Effects of Ambient Temperature Variations and Increases Driving Capacity In force · High confidence | In force | High confidence |
Also on record, not counted in the 603: 40 patents in force now held by others · 1,667 patents ended · 11 applications pending · 122 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.