36 patents currently held
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
1 more record may belong here and awaits a decision; it is not counted.
The next term ends in Feb 2029. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
5
Ending by 2030
Feb 2029
Next term end
31
Patent families
When these terms end
Held patents by the year their term ends
notable patents
all others
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends no later than Feb 2029 · Medium confidence
Also notable
Ends Apr 2040 · High confidence
Also notable
Ends Aug 2040 · High confidence
LED Light Bar for Optical Traffic Control Systems
US 8,072,346
Cited by 36 later US patents, top 25% of utility patents granted in 2011 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2029. A terminal disclaimer is on file and its reference is not resolved, so no cap is applied and the date may move earlier, never later.
Location-Based Message Distribution
US 11,158,189
The newest of the three, granted 2021. It anchors the portfolio to 2040, later than anything else here.
Incident-Based Traffic Signal Preemption and Priority
US 11,030,895
The newest of the three, granted 2021. It anchors the portfolio to 2040, later than anything else here.
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.
- 2 fees due Aug 18 to 27, 2027 · next Aug 18
- 1 fee due Sep 29, 2027The maintenance fee for Adaptive Traffic Signal Preemption (US 9,299,253) comes due Sep 29, 2027. Unpaid by Mar 29, 2028, it lapses early.
Recent changes
- 1 of the patents on this record was granted since Aug 17, 2026
What they patent
The 5 largest of its 31 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Location-Based Message Distribution | 3 in force | to Dec 2040 |
| Light Emitters for Optical Traffic Control Systems | 3 in force | to Apr 2029 |
| Incident-Based Traffic Signal Preemption and Priority | 2 in force | to Aug 2040 |
| System And Methods for Quantifying Greenhouse Gas Emissions Via Measurement and Modelling of Traffic Data and For Influencing Traffic Signaling to Reduce Such Emissions | 1 in force | to Aug 2043 |
| System and Method for Providing a Digital Intersection | 1 in force | to Jun 2041 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,072,346 | LED Light Bar for Optical Traffic Control Systems In force · Medium confidence | In force | Medium confidence | |
| US 7,808,401 | Light Emitters for Optical Traffic Control Systems In force · High confidence | In force | High confidence | |
| US 7,952,491 | Optical Traffic Control System with Burst Mode Light Emitter In force · High confidence | In force | High confidence | |
| US 8,204,955 | Method and System for Analyzing Multimedia Content In force · High confidence | In force | High confidence | |
| US 7,982,631 | LED Emitter for Optical Traffic Control Systems In force · High confidence | In force | High confidence | |
| US 8,325,062 | Centralized Management of Preemption Control of Traffic Signals In force · High confidence | In force | High confidence | |
| US 8,344,908 | Monitoring Management and Presentation of Preemption Control Data of Centrally Managed Traffic Signals In force · High confidence | In force | High confidence | |
| US 8,610,596 | Monitoring and Diagnostics of Traffic Signal Preemption Controllers In force · High confidence | In force | High confidence | |
| US 9,478,131 | Prioritization of Traffic Signal Preemption Requests Received from Multiple Sources Over Different Communication Mediums In force · High confidence | In force | High confidence | |
| US 8,487,780 | Defining Approach Maps for Traffic Signal Preemption Controllers In force · High confidence | In force | High confidence |
Also on record, not counted in the 36: 7 patents ended · 4 applications pending · 1 application 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.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.