2,366 patents currently held
111 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.
4 more records may belong here and await a decision; they are not counted.
The next term ends in Nov 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
288
Ending by 2030
Nov 2026
Next term end
2,133
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 2035 · High confidence
Also notable
Ends Dec 2032 · High confidence
Also notable
Ends Oct 2039 · High confidence
Power Supply Apparatus
US 9,977,476
Cited by 17 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.
Phosphor Device and Illumination System for Converting a First Waveband Light into a Third Waveband Light Which Is Separated into at Least Two Color Lights and Projection Apparatus with the Same (as Amended)
US 9,024,241
Cited by 29 later US patents, top 25% of utility patents granted in 2015 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2032. A terminal disclaimer caps this term to an earlier patent's.
Power Module
US 11,158,451
Cited by 14 later US patents, top 25% of utility patents granted in 2021 in our data. Protection runs to 2039.
Formerly held, still cited
Notable
Ends Feb 2034 · Medium confidence
Cited by 30 later US patents, top 10% of utility patents granted in 2019 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2034.
now held by Ancora Semiconductors Inc.
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.
- 3 fees due Nov 30, 2026
- 26 fees due Dec 2 to 30, 2026 · next Dec 2
- 36 fees due Jan 2 to 30, 2027 · next Jan 2
- 23 fees due Feb 1 to 28, 2027 · next Feb 1
- 32 fees due Mar 1 to 29, 2027 · next Mar 1
- 52 fees due Apr 1 to 30, 2027 · next Apr 1
- 38 fees due May 3 to 28, 2027 · next May 3
- 31 fees due Jun 3 to 30, 2027 · next Jun 3
- 29 fees due Jul 2 to 30, 2027 · next Jul 2
- 28 fees due Aug 2 to 27, 2027 · next Aug 2
- 38 fees due Sep 1 to 30, 2027 · next Sep 1
- 52 fees due Oct 2 to 30, 2027 · next Oct 2
- 18 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- Nov 6Assignment recorded on 1 record: Li, Sheng-Hua and 2 others to Delta Electronics, Inc. Recorded Nov 6, 2026, executed Apr 20, 2022. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76666, frame 928.
- 62 of the patents on this record were granted since Aug 16, 2026
- 13 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 2,133 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Phosphor Device and Illumination System for Converting a First Waveband Light into a Third Waveband Light Which Is Separated into at Least Two Color Lights and Projection Apparatus with the Same (as Amended) | 7 in force | to Dec 2032 |
| Power Supply Apparatus | 6 in force | to Jul 2037 |
| Power Module | 5 in force | to Feb 2040 |
| Interactive Whiteboard System and Whiteboard Writing Instrument Thereof | 5 in force | to Feb 2034 |
| Heating Device and Control Method Thereof | 4 in force | to Aug 2041 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US D671,071 | Wind Turbine In force · High confidence | In force | High confidence | |
| US D671,238 | LED Bulb Lamp In force · High confidence | In force | High confidence | |
| US D671,239 | LED Bulb Lamp In force · High confidence | In force | High confidence | |
| US 7,429,162 | Fan In force · High confidence | In force | High confidence | |
| US 7,236,077 | Transformer Having Adjustable Leakage Inductance In force · High confidence | In force | High confidence | |
| US 7,554,229 | Stator Structure of Motor In force · High confidence | In force | High confidence | |
| US 7,696,706 | Fan System and Real-Time Stopping Device Thereof In force · High confidence | In force | High confidence | |
| US 7,450,408 | Integrated Converter Having Three-Phase Power Factor Correction In force · High confidence | In force | High confidence | |
| US D673,309 | Lamp In force · High confidence | In force | High confidence | |
| US 7,852,228 | Fan System and Detector Thereof In force · High confidence | In force | High confidence |
Also on record, not counted in the 2,366: 111 patents in force now held by others · 1,025 patents ended · 554 applications pending · 1,131 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.