605 patents currently held
16 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 Aug 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
12
Ending by 2030
Aug 2027
Next term end
604
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 Dec 2033 · High confidence
Also notable
Ends Mar 2036 · High confidence
Also notable
Ends Jul 2033 · High confidence
Apparatus and Method for Energy Display
US 9,116,014
The most cited patent in this portfolio, cited by 139 later US patents, top 5% of utility patents granted in 2015 in our data. Protection runs to 2033.
Multi-Level Inverter
US 9,825,549
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 2036.
Motor Starter System and Method for Operating Same
US 9,473,050
Granted 2016 and renewed at every maintenance window due so far. Protection runs to 2033.
Formerly held, still cited
Notable
Ends Aug 2028 · High confidence
Renewed at every maintenance window since the 2014 grant; no more fees are due before its term ends in 2028.
now held by Oxford University Innovation Limited
Also notable
Ends Jul 2033 · High confidence
Electric Vehicle and Method of Operating Using an Sae Standard and User Terminal Device
US 9,566,873
Granted 2017 and renewed at every maintenance window due so far. Protection runs to 2033.
now held by LS 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.
- 2 fees due Nov 14 to 21, 2026 · next Nov 14
- 3 fees due Dec 2 to 9, 2026 · next Dec 2
- 11 fees due Jan 2 to 28, 2027 · next Jan 2
- 19 fees due Feb 4 to 27, 2027 · next Feb 4
- 13 fees due Mar 1 to 29, 2027 · next Mar 1
- 10 fees due Apr 8 to 29, 2027 · next Apr 8
- 19 fees due May 3 to 26, 2027 · next May 3
- 9 fees due Jun 1 to 30, 2027 · next Jun 1
- 7 fees due Jul 7 to 28, 2027 · next Jul 7
- 9 fees due Aug 11 to 25, 2027 · next Aug 11
- 8 fees due Sep 1 to 22, 2027 · next Sep 1
- 13 fees due Oct 5 to 28, 2027 · next Oct 5
- 4 fees due Nov 3 to 10, 2027 · next Nov 3
Recent changes
- 9 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 604 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Optimal Operation and Scheduling Based on Microgrid Demand States | 2 in force | to Oct 2038 |
| Arc Extinguishing Unit of Molded Case Circuit Breaker | 1 in force | to Oct 2039 |
| Power Supply Device for Protective Relay | 1 in force | to Jan 2039 |
| Microgrid System | 1 in force | to Dec 2038 |
| Energy Storage System | 1 in force | to Sep 2038 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US D688,200 | Portable Electric Vehicle Charger In force · High confidence | In force | High confidence | |
| US D692,374 | Charger for Electric Automobiles In force · High confidence | In force | High confidence | |
| US D698,725 | Inverter In force · High confidence | In force | High confidence | |
| US D703,136 | Inverter In force · High confidence | In force | High confidence | |
| US D705,728 | Inverter In force · High confidence | In force | High confidence | |
| US D707,176 | Inverter In force · High confidence | In force | High confidence | |
| US D719,105 | Motor-Protection Relay In force · High confidence | In force | High confidence | |
| US D724,545 | Terminal for Motor-Protection Relay In force · High confidence | In force | High confidence | |
| US D733,046 | Body of Electric Automobile Charger In force · High confidence | In force | High confidence | |
| US D733,047 | Holder for Electric Automobile Chargers In force · High confidence | In force | High confidence |
Also on record, not counted in the 605: 16 patents in force now held by others · 309 patents ended · 174 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.