1,428 patents currently held
222 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.
7 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.
279
Ending by 2030
Nov 2026
Next term end
587
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 Jun 2030 · High confidence
Also notable
Ends May 2032 · High confidence
Also notable
Ends Apr 2028 · High confidence
Memory Component That Performs Data Write from Pre-Programmed Register
US 11,204,863
Cited by 33 later US patents, top 5% of utility patents granted in 2021 in our data. Protection runs to 2030. A terminal disclaimer caps this term to an earlier patent's.
System and Method for Providing a Command Buffer in a Memory System
US 9,552,175
Cited by 63 later US patents, top 5% of utility patents granted in 2017 in our data, and renewed at every maintenance window due so far. Protection runs to 2032.
Controller to Detect Malfunctioning Address of Memory Device
US 10,446,256
Cited by 34 later US patents, top 10% of utility patents granted in 2019 in our data. Protection runs to 2028. A terminal disclaimer caps this term to an earlier patent's.
Formerly held, still cited
Notable
Ends Jan 2029 · High confidence
Cited by 192 later US patents, top 5% of utility patents granted in 2010 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2029.
now held by III Holdings 1, LLC
Also notable
Ends Jan 2027 · High confidence
Cited by 255 later US patents, top 5% of utility patents granted in 2009 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2027.
now held by Invent.Ly, LLC
Also notable
Ends May 2029 · High confidence
The most cited patent in this portfolio, cited by 274 later US patents, top 5% of utility patents granted in 2012 in our data. Protection runs to 2029.
now held by Signal LLP
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.
- 21 fees due Nov 16 to 30, 2026 · next Nov 16
- 26 fees due Dec 2 to 30, 2026 · next Dec 2
- 18 fees due Jan 2 to 30, 2027 · next Jan 2
- 32 fees due Feb 1 to 28, 2027 · next Feb 1
- 32 fees due Mar 1 to 29, 2027 · next Mar 1
- 46 fees due Apr 1 to 30, 2027 · next Apr 1
- 32 fees due May 3 to 28, 2027 · next May 3
- 32 fees due Jun 1 to 30, 2027 · next Jun 1
- 23 fees due Jul 2 to 30, 2027 · next Jul 2
- 26 fees due Aug 4 to 27, 2027 · next Aug 4
- 32 fees due Sep 1 to 30, 2027 · next Sep 1
- 36 fees due Oct 2 to 30, 2027 · next Oct 2
- 9 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- 29 of the patents on this record were granted since Aug 16, 2026
- 28 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 587 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Programmable Memory Repair Scheme | 14 in force | to Aug 2028 |
| Method and Apparatus for Calibrating Write Timing in a Memory System | 13 in force | to May 2034 |
| Maintenance Operations in a DRAM | 12 in force | to Feb 2032 |
| Protocol for Memory Power-Mode Control | 11 in force | to Mar 2032 |
| System and Method of Interfacing Co-Processors and Input/Output Devices via a Main Memory System | 10 in force | to Sep 2033 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 11,302,371 | Memory Systems and Methods for Dividing Physical Memory Locations Into Temporal Memory Locations In force · High confidence | In force | High confidence | |
| US 7,376,807 | Data Processing System Having Address Translation Bypass and Method Therefor In force · High confidence | In force | High confidence | |
| US 7,516,029 | Communication Channel Calibration Using Feedback In force · High confidence | In force | High confidence | |
| US 9,225,918 | Image Sensor Having Sub-Diffraction-Limit Pixels In force · High confidence | In force | High confidence | |
| US 9,007,853 | Memory Systems and Methods for Dynamically Phase Adjusting a Write Strobe and Data to Account for Receive-Clock Drift In force · High confidence | In force | High confidence | |
| US 9,431,090 | Memory Systems and Methods for Dynamically Phase Adjusting a Write Strobe and Data to Account for Receive-Clock Drift In force · High confidence | In force | High confidence | |
| US 7,683,492 | Semiconductor Device In force · High confidence | In force | High confidence | |
| US D675,349 | Light Conductor and Light Emitter for a LED Light Source held by Rambus Delaware LLC In force · High confidence | In force | High confidence | |
| US 7,447,944 | Predictive Methods and Apparatus for Non-Volatile Memory In force · High confidence | In force | High confidence | |
| US 7,489,739 | Method and Apparatus for Data Recovery In force · High confidence | In force | High confidence |
Also on record, not counted in the 1,428: 222 patents in force now held by others · 1,208 patents ended · 170 applications pending · 186 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.