Subcom, LLC

99 patents currently held · Updated Nov 14, 2026

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

Previously recorded as Tyco Electronics Subsea Communications LLC (to 2018)

Ending by 2030

Dec 2026

Next term end

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030203120322033203420352036203720382039204020412042204320442045

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.

1 fee due Nov 30, 2026
The maintenance fee for System, Apparatus and Method for Efficient Optical Signal Amplification with System Monitoring Features (US 11,664,901) comes due Nov 30, 2026. Unpaid by Jun 1, 2027, it lapses early.
2 fees due Jan 2 to 18, 2027 · next Jan 2
3 fees due Feb 6 to 13, 2027 · next Feb 6
3 fees due Mar 3 to 19, 2027 · next Mar 3
5 fees due Apr 10 to 22, 2027 · next Apr 10
2 fees due Jun 3 to 30, 2027 · next Jun 3
3 fees due Jul 2 to 9, 2027 · next Jul 2
1 fee due Aug 27, 2027
The maintenance fee for Spatially resolved perturbation detection using line monitoring system (US 11,914,040) comes due Aug 27, 2027. Unpaid by Feb 28, 2028, it lapses early.
1 fee due Sep 5, 2027
The maintenance fee for Gain Equalization in C+l Erbium-Doped Fiber Amplifiers (US 11,923,651) comes due Sep 5, 2027. Unpaid by Mar 6, 2028, it lapses early.
5 fees due Oct 2 to 28, 2027 · next Oct 2
4 fees due Nov 7 to 12, 2027 · next Nov 7

Which patents, and when each one lapses · Pro

Recent changes

4 of the patents on this record were granted since Aug 16, 2026

Patents held now

Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.

Patent	Title	Status	Expires	Confidence
US 7,681,068	System and Method for Providing Event Hysteresis in Network Management Systems In force Term ends Dec 21, 2026 · High confidence	In force	Term ends Dec 21, 2026	High confidence
US 7,809,279	System and Method Using Differential Loop Gain for Fault Identification in Line Monitoring Equipment In force Term ends Nov 29, 2028 · High confidence	In force	Term ends Nov 29, 2028	High confidence
US 7,872,737	System and Method for Optical Time Domain Reflectometry Using Multi-Resolution Code Sequences In force Term ends Jul 23, 2029 · High confidence	In force	Term ends Jul 23, 2029	High confidence
US 8,559,773	Coupling Multiple Conductor Undersea Optical Cables to an Undersea Device with an Isolated Bypass Conductive Path Across the Undersea Device In force Term ends Feb 1, 2030 · High confidence	In force	Term ends Feb 1, 2030	High confidence
US 8,244,140	Communicating with Components in Optical Communication Systems Using Voltage Signal Detection and Signature Analysis In force Term ends Oct 31, 2030 · High confidence	In force	Term ends Oct 31, 2030	High confidence
US 8,328,431	Coupling Multiple Conductor Undersea Optical Cables to an Undersea Device with an Isolated Bypass Conductive Path Across the Undersea Device In force Term ends Jan 8, 2031 · High confidence	In force	Term ends Jan 8, 2031	High confidence
US 10,003,425	Branching Configuration Including Separate Branching Unit and Predetermined Wavelength Filter Unit and System and Method Including the Same In force Term ends Jan 30, 2031 · High confidence	In force	Term ends Jan 30, 2031	High confidence
US 8,280,205	Fiber Optic Connector and Alignment Mechanism for Single Lens Multi-Fiber Connector In force Term ends Feb 21, 2031 · High confidence	In force	Term ends Feb 21, 2031	High confidence
US 8,305,877	System and Method for Distributed Fault Sensing and Recovery In force Term ends Mar 5, 2031 · High confidence	In force	Term ends Mar 5, 2031	High confidence
US 8,401,392	Flexible Branching Unit and System Including the Same In force Term ends May 7, 2031 · High confidence	In force	Term ends May 7, 2031	High confidence

10 of 99 patents shown.

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Pro members: see all 99 patents

Also on record, not counted in the 99: 40 lapsed for an unpaid fee · 90 ended at full term. List them

Sources and methods

Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand. How this record was built

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

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Published applications

US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.

7 pending · 1 abandoned

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