313 patents currently held
1 more in force is now held by another company
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
30 more records may belong here and await a decision; they are not counted.
The next term ends in Dec 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
65
Ending by 2030
Dec 2026
Next term end
292
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 May 2037 · High confidence
Also notable
Ends May 2035 · High confidence
Also notable
Ends Aug 2032 · High confidence
PON Wavelength Bonding for Providing Higher-Rate Data Services
US 10,397,674
Cited by 15 later US patents, top 25% of utility patents granted in 2019 in our data. Protection runs to 2037.
Telecommunication Systems and Methods Using Dynamic Shaping for Allocating Network Bandwidth
US 10,225,195
Cited by 17 later US patents, top 25% of utility patents granted in 2019 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2035.
Systems and Methods for Extending Optical Network Services Across Non-Optical Channels
US 8,965,209
Cited by 20 later US patents, top 25% of utility patents granted in 2015 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2032.
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.
- 3 fees due Nov 14 to 21, 2026 · next Nov 14
- 5 fees due Dec 2 to 30, 2026 · next Dec 2
- 6 fees due Jan 14 to 30, 2027 · next Jan 14
- 5 fees due Feb 13 to 27, 2027 · next Feb 13
- 5 fees due Mar 1 to 29, 2027 · next Mar 1
- 3 fees due Apr 13 to 30, 2027 · next Apr 13
- 7 fees due May 3 to 26, 2027 · next May 3
- 2 fees due Jun 10 to 29, 2027 · next Jun 10
- 7 fees due Jul 5 to 28, 2027 · next Jul 5
- 1 fee due Aug 23, 2027The maintenance fee for Systems and Methods for Ethernet-Based Management of Optical Networks Using Omci (US 9,270,480) comes due Aug 23, 2027. Unpaid by Feb 23, 2028, it lapses early.
- 5 fees due Sep 8 to 30, 2027 · next Sep 8
- 2 fees due Oct 5 to 19, 2027 · next Oct 5
- 2 fees due Nov 3 to 10, 2027 · next Nov 3
Recent changes
- 3 of the patents on this record were granted since Aug 16, 2026
- 13 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 292 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Method and Apparatus for Generating a Tone Signal | 7 in force | to Apr 2045 |
| Telecommunication Systems and Methods Using Dynamic Shaping for Allocating Network Bandwidth | 3 in force | to Sep 2035 |
| Systems and Methods for Communicating High Speed Signals in a Communication Device | 2 in force | to Jun 2039 |
| PON Wavelength Bonding for High-Rate Services | 2 in force | to May 2037 |
| Frameless Telecommunications Enclosure | 2 in force | to Jun 2034 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,457,234 | System and Method for Protecting Communication Between a Central Office and a Remote Premises In force · High confidence | In force | High confidence | |
| US 7,539,142 | Ethernet Lan Interface for T3 Network In force · High confidence | In force | High confidence | |
| US 7,375,940 | Transformer Interface for Preventing EMI-Based Current Imbalances from Falsely Triggering Ground Fault Interrupt In force (reinstated) · High confidence | In force (reinstated) | High confidence | |
| US 7,515,591 | Primary Channel Bank-Resident Mechanism for Scheduling Downstream Data Transmissions to Ports of Multiple Channel Banks In force · High confidence | In force | High confidence | |
| US 7,545,830 | Defragmented Packet Analysis for Differential Priority Routing In force · High confidence | In force | High confidence | |
| US 7,539,298 | Passive Termination for Redundant Telecommunication Receivers Connected to a Single Twisted Pair In force · High confidence | In force | High confidence | |
| US 7,477,596 | Policing Engine Providing Dynamic Adjustment of Peak and Sustained Data Cell Rates and Efficient Transfer of AAL5 Cells In force · High confidence | In force | High confidence | |
| US 7,590,921 | Data Communication System and Method In force · High confidence | In force | High confidence | |
| US 7,861,002 | Network Router That Efficiently Switches Between a Primary Data Path and a Backup Data Path In force · High confidence | In force | High confidence | |
| US 7,697,408 | Data Communication System and Method Capable of Limiting Effects of Crosstalk by Adjusting Transceiver Power Levels In force · High confidence | In force | High confidence |
Also on record, not counted in the 313: 1 patent in force now held by others · 122 patents ended · 19 applications pending · 36 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.