1,396 patents currently held
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.
269
Ending by 2030
Nov 2026
Next term end
1,219
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 Sep 2036 · High confidence
Also notable
Ends Apr 2031 · High confidence
Also notable
Ends Jan 2035 · High confidence
Semiconductor Device and Manufacturing Method Thereof
US 9,985,048
Cited by 85 later US patents, top 5% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2036.
Nonvolatile Memory Cell, Nonvolatile Memory Device and Method for Driving the Same
US 8,289,761
Cited by 25 later US patents, top 25% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2031.
Double-Source Semiconductor Device
US 9,224,752
Cited by 33 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 2035.
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.
- 18 fees due Jan 7 to 28, 2027 · next Jan 7
- 16 fees due Feb 4 to 28, 2027 · next Feb 4
- 26 fees due Mar 1 to 29, 2027 · next Mar 1
- 21 fees due Apr 1 to 29, 2027 · next Apr 1
- 26 fees due May 3 to 26, 2027 · next May 3
- 19 fees due Jun 1 to 30, 2027 · next Jun 1
- 17 fees due Jul 5 to 28, 2027 · next Jul 5
- 16 fees due Aug 2 to 27, 2027 · next Aug 2
- 21 fees due Sep 1 to 30, 2027 · next Sep 1
- 18 fees due Oct 5 to 30, 2027 · next Oct 5
- 14 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
- 14 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 1,219 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Variable Resistive Memory Device Including Vertical Channel PMOS Transistor and Method of Manufacturing the Same | 4 in force | to Apr 2034 |
| Nonvolatile Memory Cell, Nonvolatile Memory Device and Method for Driving the Same | 4 in force | to Apr 2031 |
| Memory, Memory System, Operation Method of the Memory, and Operation of the Memory System | 3 in force | to Mar 2041 |
| Electrostatic Discharge Protection Device | 3 in force | to Mar 2040 |
| Semiconductor Apparatus for Compensating for Degradation and Semiconductor System Using the Same | 3 in force | to Dec 2037 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,920,008 | Data Output Clock Generating Circuit and Method of Generating Data Output Clock of Semiconductor Memory Apparatus In force · Medium confidence | In force | Medium confidence | |
| US 7,402,864 | Method for Forming a DRAM Semiconductor Device with a Sense Amplifier In force · High confidence | In force | High confidence | |
| US 7,813,197 | Write Circuit of Memory Device In force · Medium confidence | In force | Medium confidence | |
| US 7,531,855 | Multi-Chip Device and Method for Manufacturing the Same In force · High confidence | In force | High confidence | |
| US 7,385,860 | Data Output Circuit of Synchronous Memory Device In force · High confidence | In force | High confidence | |
| US 7,379,360 | Repair Fuse Circuit for Storing I/O Repair Information Therein In force · High confidence | In force | High confidence | |
| US 7,697,348 | Semiconductor Memory Device In force · Medium confidence | In force | Medium confidence | |
| US 7,332,251 | Pattern Decomposition and Optical Proximity Correction Method for Double Exposure When Forming Photomasks In force · High confidence | In force | High confidence | |
| US 7,417,493 | Voltage Generator in a Flash Memory Device In force · High confidence | In force | High confidence | |
| US 7,430,099 | Electrostatic Discharge Protection Circuit Protecting Thin Gate Insulation Layers in a Semiconductor Device In force · High confidence | In force | High confidence |
Also on record, not counted in the 1,396: 136 patents ended · 2 applications pending. 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.