13 patents currently held
7 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 Apr 2030. from the record
Of the 7 now held by other companies, 7 name Fuji Electric Co. Ltd. as their current owner. Each row says so.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
3
Ending by 2030
Apr 2030
Next term end
8
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 Nov 2031 · High confidence
Also notable
Ends Apr 2031 · High confidence
Also notable
Ends May 2033 · High confidence
Multi-Level Voltage Regulator System
US 9,520,772
The most cited patent in this portfolio, cited by 37 later US patents, top 10% of utility patents granted in 2016 in our data. Protection runs to 2031.
Thermal Management System and Method
US 9,119,327
Cited by 26 later US patents, top 25% of utility patents granted in 2015 in our data, and renewed at every maintenance window due so far. Protection runs to 2031.
Dc-Dc Converter
US 8,929,098
Granted 2015 and renewed at every maintenance window due so far. Protection runs to 2033.
Formerly held, still cited
Notable
Ends Nov 2027 · High confidence
The largest patent family in this portfolio, 13 related applications, renewed at 3 of 3 maintenance windows. Protection runs to 2027.
now held by Fuji Electric Co., 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.
- 1 fee due Feb 25, 2027The maintenance fee for Thermal Management System and Method (US 9,119,327) comes due Feb 25, 2027. Unpaid by Aug 25, 2027, it lapses early.
- 1 fee due Mar 22, 2027The maintenance fee for Loosely Regulated Feedback Control for High Efficiency Isolated Dc-Dc Converters (US 9,143,047) comes due Mar 22, 2027. Unpaid by Sep 22, 2027, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 3 largest of its 8 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Loosely Regulated Feedback Control for High Efficiency Isolated DC-DC Converters | 4 in force | to Nov 2031 |
| Ic Thermal Management System | 3 in force | to Apr 2031 |
| Dc-Dc Converter | 1 in force | to May 2033 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,319,114 | Surface Mount Power Module Dual Footprint In force · High confidence | In force | High confidence | |
| US 8,531,841 | Ic Thermal Management System In force · High confidence | In force | High confidence | |
| US 9,408,327 | Thermal Management System and Method In force · High confidence | In force | High confidence | |
| US 8,339,228 | Edgewise Coil and Inductor In force · High confidence | In force | High confidence | |
| US 9,143,047 | Loosely Regulated Feedback Control for High Efficiency Isolated Dc-Dc Converters In force · Medium confidence | In force | Medium confidence | |
| US 9,119,327 | Thermal Management System and Method In force · High confidence | In force | High confidence | |
| US 10,218,265 | State Space-Based Multi-Level Voltage Regulator System In force · Medium confidence | In force | Medium confidence | |
| US 8,934,267 | Loosely Regulated Feedback Control for High Efficiency Isolated DC-DC Converters In force · High confidence | In force | High confidence | |
| US 9,520,772 | Multi-Level Voltage Regulator System In force · High confidence | In force | High confidence | |
| US 8,929,098 | Dc-Dc Converter In force · High confidence | In force | High confidence |
Also on record, not counted in the 13: 7 patents in force now held by others · 46 patents ended · 3 applications pending · 13 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.