2,007 patents currently held
225 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.
45 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.
441
Ending by 2030
Nov 2026
Next term end
1,704
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 Mar 2031 · High confidence
Also notable
Ends Feb 2028 · High confidence
Also notable
Ends Sep 2031 · High confidence
Systems and Methods for Designing and Making Integrated Circuits with Consideration of Wiring Demand Ratio
US 8,407,647
Cited by 92 later US patents, top 10% of utility patents granted in 2013 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2031.
Patterning a Single Integrated Circuit Layer Using Multiple Masks and Multiple Masking Layers
US 7,537,866
Cited by 97 later US patents, top 10% of utility patents granted in 2009 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.
Physical Unclonable Function with Improved Start-Up Behavior
US 8,848,477
Cited by 36 later US patents, top 25% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2031.
Formerly held, still cited
Notable
Ends Apr 2029 · High confidence
Cited by 105 later US patents, top 5% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2029.
now held by Black Duck Software, Inc.
Also notable
Ends Feb 2028 · High confidence
Cited by 121 later US patents, top 5% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028. A terminal disclaimer caps this term to an earlier patent's.
now held by Mips Holding, 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.
- 40 fees due Dec 2 to 30, 2026 · next Dec 2
- 32 fees due Jan 2 to 30, 2027 · next Jan 2
- 33 fees due Feb 1 to 28, 2027 · next Feb 1
- 30 fees due Mar 1 to 29, 2027 · next Mar 1
- 28 fees due Apr 1 to 27, 2027 · next Apr 1
- 32 fees due May 3 to 28, 2027 · next May 3
- 37 fees due Jun 1 to 30, 2027 · next Jun 1
- 28 fees due Jul 2 to 28, 2027 · next Jul 2
- 16 fees due Aug 2 to 27, 2027 · next Aug 2
- 34 fees due Sep 1 to 30, 2027 · next Sep 1
- 24 fees due Oct 2 to 30, 2027 · next Oct 2
- 11 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- 48 of the patents on this record were granted since Aug 16, 2026
- 26 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 1,704 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| High Performance Design Rule Checking Technique | 10 in force | to Jan 2031 |
| Proof of Execution Using Random Function | 8 in force | to Feb 2033 |
| Systems and Methods for Designing and Making Integrated Circuits with Consideration of Wiring Demand Ratio | 6 in force | to Oct 2032 |
| Analysis of Stress Impact on Transistor Performance | 5 in force | to May 2031 |
| Method and Apparatus for Versatile Controllability and Observability in Prototype System | 5 in force | to Feb 2031 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,474,568 | Non-Volatile Memory with Programming Through Band-To-Band Tunneling and Impact Ionization Gate Current In force · High confidence | In force | High confidence | |
| US 7,718,492 | Non-Volatile Memory Cell Circuit with Programming Through Band-To-Band Tunneling and Impact Ionization Gate Current In force · High confidence | In force | High confidence | |
| US 7,494,933 | Method for Achieving Uniform Etch Depth Using Ion Implantation and a Timed Etch In force · High confidence | In force | High confidence | |
| US 7,970,590 | Parametric Timing Analysis In force · High confidence | In force | High confidence | |
| US 7,415,684 | Facilitating Structural Coverage of a Design During Design Verification In force · High confidence | In force | High confidence | |
| US 7,590,902 | Methods and Apparatuses for External Delay Test of Input-Output Circuits In force · High confidence | In force | High confidence | |
| US 7,616,036 | Programmable Strobe and Clock Generator In force · High confidence | In force | High confidence | |
| US 7,458,040 | Resettable Memory Apparatuses and Design In force · High confidence | In force | High confidence | |
| US 8,146,047 | Design Automation Method and System for Assessing Timing Based on Gaussian Slack In force · Medium confidence | In force | Medium confidence | |
| US 8,283,751 | Split-Channel Antifuse Array Architecture In force · High confidence | In force | High confidence |
Also on record, not counted in the 2,007: 225 patents in force now held by others · 795 patents ended · 96 applications pending · 113 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.