11 patents currently held
109 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.
4 more records may belong here and await a decision; they are not counted.
The next term ends in Jan 2027. from the record
Of the 109 now held by other companies, 42 name Hitachi Metals Ltd. as their current owner, and 67 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
8
Ending by 2030
Jan 2027
Next term end
11
Patent families
When these terms end
Held patents by the year their term ends
notable patents
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.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Jul 2032 · High confidence
Also notable
Ends Jan 2027 · High confidence
Also notable
Ends Nov 2027 · High confidence
Differential Signal Transmission Cable
US 8,546,691
Renewed at every maintenance window since the 2013 grant; no more fees are due before its term ends in 2032.
A Method of Manufacturing a Wiring Material
US 7,832,099
Renewed at every maintenance window since the 2010 grant; no more fees are due before its term ends in 2027.
Extra-Fine Copper Alloy Wire, Extra-Fine Copper Alloy Twisted Wire, Extra-Fine Insulated Wire, Coaxial Cable, Multicore Cable and Manufacturing Method Thereof
US 7,544,886
Renewed at every maintenance window since the 2009 grant; no more fees are due before its term ends in 2027.
Formerly held, still cited
Notable
Ends Apr 2033 · High confidence
The most cited patent in this portfolio, cited by 90 later US patents, top 5% of utility patents granted in 2015 in our data. Protection runs to 2033.
now held by Proterial, Ltd.
Also notable
Ends Mar 2032 · High confidence
Cited by 49 later US patents, top 25% of utility patents granted in 2013 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2032.
now held by Hitachi Metals, Ltd.
Also notable
Ends Nov 2030 · High confidence
Cited by 42 later US patents, top 25% of utility patents granted in 2015 in our data, and renewed at every maintenance window due so far. Protection runs to 2030.
now held by Hitachi Metals, Ltd.
Fee deadlines
No maintenance fee falls due on this company's record before Nov 10, 2027.
Recent changes
- 8 terms have ended since Aug 16, 2026
What they patent
The 2 largest of its 11 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Differential Signal Transmission Cable | 1 in force | to Jul 2032 |
| A Method of Manufacturing a Wiring Material | 1 in force | to Jan 2027 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,832,099 | A Method of Manufacturing a Wiring Material In force · High confidence | In force | High confidence | |
| US D689,025 | Installer for a Connector In force · High confidence | In force | High confidence | |
| US 7,544,886 | Extra-Fine Copper Alloy Wire, Extra-Fine Copper Alloy Twisted Wire, Extra-Fine Insulated Wire, Coaxial Cable, Multicore Cable and Manufacturing Method Thereof In force · High confidence | In force | High confidence | |
| US 7,744,275 | Optical Fiber Temperature Sensing Device In force · High confidence | In force | High confidence | |
| US 7,779,706 | Cable-Type Load Sensor In force · High confidence | In force | High confidence | |
| US 8,193,451 | Polyamide-Imide Resin Insulating Varnish and Insulated Wire Using the Same held by Hitachi Magnet Wire Corp. and Hitachi Cable, Ltd. In force · High confidence | In force | High confidence | |
| US 7,932,468 | Insulated Electric Wire held by Hitachi Magnet Wire Corp. and Hitachi Cable, Ltd. In force · High confidence | In force | High confidence | |
| US 8,258,403 | Insulation Coating for Electric Wires and Electric Insulated Wire Using Same held by Hitachi Cable, Ltd. and Hitachi Magnet Wire Corp. In force · High confidence | In force | High confidence | |
| US 8,182,960 | Metal Separator for Fuel Cells and Fabricating Method Thereof In force · High confidence | In force | High confidence | |
| US 8,466,364 | Cable Fixing Member and Cable Fixing Structure In force · High confidence | In force | High confidence |
Also on record, not counted in the 11: 109 patents in force now held by others · 600 patents ended · 219 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.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.