1 patent currently held
295 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.
The next term ends in Mar 2039. from the record
Of the 295 now held by other companies, 254 name ST Portfolio Holdings LLC as their current owner, and 41 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Mar 2039
Next term end
1
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
Only 1 of the currently held patents qualifies as notable.
Formerly held, still cited
Notable
Ends Apr 2029 · High confidence
Cited by 79 later US patents, top 5% of utility patents granted in 2019 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2029.
now held by ST Portfolio Holdings, LLC
Also notable
Ends Nov 2031 · High confidence
Cited by 106 later US patents, top 5% of utility patents granted in 2015 in our data, and renewed at every maintenance window due so far. Protection runs to 2031.
now held by ST Portfolio Holdings, LLC
Also notable
Ends no later than Jun 2031 · Medium confidence
Cited by 127 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 2031. 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.
now held by ST Portfolio Holdings, LLC
Fee deadlines
No maintenance fee falls due on this company's record before Nov 10, 2027.
Recent changes
- 4 of the patents on this record were granted since Aug 16, 2026
What they patent
Grouped by real patent family, largest first, labeled by the earliest filing in each. No technology classification is inferred from titles.
| Eartips And Earphone Devices, And Systems And Methods Therefor | 1 in force | to Mar 2039 |
Patents held now
Soonest term end first.
Showing 1 to 1 of 1
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 11,638,084 | Eartips And Earphone Devices, And Systems And Methods Therefor held by Earsoft, LLC In force · High confidence | In force | High confidence |
Also on record, not counted in the 1: 295 patents in force now held by others · 2 patents ended · 8 applications pending · 20 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.
8 terminal disclaimers are on file with no resolved reference. No cap is applied and none is guessed
16 computed term dates come from a chain with an unresolved parent. A continuity parent has not yet been fetched from USPTO's records. The term is dated from this application's own claim; no earlier date is assumed until the parent is resolved.