164 patents currently held
4 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.
27 more records may belong here and await a decision; they are not counted.
The next term ends in May 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
25
Ending by 2030
May 2027
Next term end
69
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 Apr 2036 · High confidence
Also notable
Ends Oct 2039 · High confidence
Also notable
Ends Jun 2027 · High confidence
Power Optimization for Linear Regulator
US 10,136,487
Cited by 24 later US patents, top 25% of utility patents granted in 2018 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2036.
Input Voltage Dependent Control for Active Clamp Flyback
US 11,336,190
Cited by 7 later US patents, top 25% of utility patents granted in 2022 in our data. Protection runs to 2039.
LED Current Control Circuits and Methods
US 7,683,553
The largest patent family in this portfolio, 7 related applications, renewed at 3 of 3 maintenance windows. Protection runs to 2027.
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 Nov 14, 2026The maintenance fee for Referenceless Clock and Data Recovery Circuits (US 10,291,241) comes due Nov 14, 2026. Unpaid by May 14, 2027, it lapses early.
- 2 fees due Dec 4 to 25, 2026 · next Dec 4
- 1 fee due Jan 28, 2027The maintenance fee for Redriver with Output Receiver Detection That Mirrors Detected Termination on Output to Input (US 9,094,245) comes due Jan 28, 2027. Unpaid by Jul 28, 2027, it lapses early.
- 2 fees due Feb 11 to 22, 2027 · next Feb 11
- 3 fees due Mar 5 to 19, 2027 · next Mar 5
- 1 fee due Apr 1, 2027The maintenance fee for Stereo Audio System and Method (US 10,433,062) comes due Apr 1, 2027. Unpaid by Oct 1, 2027, it lapses early.
- 1 fee due Jun 3, 2027The maintenance fee for Multipath Clock and Data Recovery (US 10,498,523) comes due Jun 3, 2027. Unpaid by Dec 3, 2027, it lapses early.
- 2 fees due Jul 16 to 28, 2027 · next Jul 16
- 4 fees due Aug 2 to 27, 2027 · next Aug 2
- 1 fee due Sep 17, 2027The maintenance fee for Switch Mode Power Supply for Continuous Conduction Mode Operation (US 10,594,224) comes due Sep 17, 2027. Unpaid by Mar 17, 2028, it lapses early.
- 1 fee due Oct 28, 2027The maintenance fee for Dead-Time Control for Half-Bridge Driver Circuit (US 10,637,348) comes due Oct 28, 2027. Unpaid by Apr 28, 2028, it lapses early.
Recent changes
- 11 of the patents on this record were granted since Aug 16, 2026
What they patent
The 5 largest of its 69 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Clock Signal Skew Calibration Apparatus and Control Method | 24 in force | to Dec 2044 |
| Leadframe | 15 in force | to Aug 2041 |
| Dead-Time Control for Half-Bridge Driver Circuit | 9 in force | to May 2041 |
| Fault Diagnosis Apparatus and Method | 8 in force | to Jun 2045 |
| Self-Aligned Dual Trench Device | 7 in force | to Nov 2036 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,786,555 | Semiconductor Devices with Multiple Heat Sinks In force · High confidence | In force | High confidence | |
| US 7,683,553 | LED Current Control Circuits and Methods In force · High confidence | In force | High confidence | |
| US 7,932,536 | Power Rectifiers and Method of Making Same In force · High confidence | In force | High confidence | |
| US 7,579,910 | Low Distortion Switching Amplifier Circuits and Methods In force · High confidence | In force | High confidence | |
| US 7,545,834 | Multiple Channel Switch Using Differential De-Mux Amplifier and Differential Mux Equalizer In force · High confidence | In force | High confidence | |
| US 7,709,864 | High-Efficiency Schottky Rectifier and Method of Manufacturing Same In force · High confidence | In force | High confidence | |
| US 7,915,871 | Systems and Methods for DC to DC Conversion with Current Mode Control In force · High confidence | In force | High confidence | |
| US 8,536,849 | Systems and Methods for DC to DC Conversion with Peak and Valley Current Detection Control In force · High confidence | In force | High confidence | |
| US 8,610,463 | Redriver with Output Receiver Detection That Mirrors Detected Termination on Output to Input In force · Medium confidence | In force | Medium confidence | |
| US 9,094,245 | Redriver with Output Receiver Detection That Mirrors Detected Termination on Output to Input In force · Medium confidence | In force | Medium confidence |
Also on record, not counted in the 164: 4 patents in force now held by others · 99 patents ended · 50 applications pending · 16 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.