3 patents currently held
28 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 Oct 2031. from the record
Of the 28 now held by other companies, 26 name AAC Technologies Pte Ltd. as their current owner, and 2 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
Oct 2031
Next term end
3
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 Feb 2032 · High confidence
Also notable
Ends Oct 2031 · High confidence
Also notable
Ends Apr 2034 · High confidence
MEMS Microphone
US 8,670,579
The most cited patent in this portfolio, cited by 119 later US patents, top 5% of utility patents granted in 2014 in our data. Protection runs to 2032.
Silicon Based Capacitive Microphone
US 8,379,881
Cited by 107 later US patents, top 5% of utility patents granted in 2013 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2031.
Electromagnetic Transducer
US 9,071,909
Granted 2015 and renewed at every maintenance window due so far. Protection runs to 2034.
Formerly held, still cited
Notable
Ends Apr 2031 · High confidence
Cited by 118 later US patents, top 5% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2031.
now held by AAC Technologies Pte. Ltd.
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 Dec 30, 2026The maintenance fee for Electromagnetic Transducer (US 9,071,909) comes due Dec 30, 2026. Unpaid by Jun 30, 2027, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
Patents held now
Soonest term end first.
Showing 1 to 3 of 3
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,379,881 | Silicon Based Capacitive Microphone In force · High confidence | In force | High confidence | |
| US 8,670,579 | MEMS Microphone In force · High confidence | In force | High confidence | |
| US 9,071,909 | Electromagnetic Transducer In force · High confidence | In force | High confidence |
Also on record, not counted in the 3: 28 patents in force now held by others · 30 patents ended · 32 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.