136 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.
1 more record may belong here and awaits a decision; it is not counted.
The next term ends in Sep 2029. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
24
Ending by 2030
Sep 2029
Next term end
65
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 Jun 2031 · High confidence
Also notable
Ends Jul 2034 · High confidence
Also notable
Ends Feb 2038 · High confidence
Wide Area Positioning System
US 9,057,606
Cited by 175 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.
Systems and Methods for Using Three-Dimensional Location Information to improve Location Services
US 9,326,105
Cited by 120 later US patents, top 5% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2034.
Systems and Methods for Calibrating Unstable Sensors
US 10,514,258
Cited by 32 later US patents, top 10% of utility patents granted in 2019 in our data. Protection runs to 2038.
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 Dec 6 to 16, 2026 · next Dec 6
- 1 fee due Jan 18, 2027The maintenance fee for Wide Area Positioning System (US 11,705,936) comes due Jan 18, 2027. Unpaid by Jul 19, 2027, it lapses early.
- 7 fees due Feb 8 to 28, 2027 · next Feb 8
- 1 fee due Mar 19, 2027The maintenance fee for Calibrating A Pressure Sensor (US 11,761,765) comes due Mar 19, 2027. Unpaid by Sep 20, 2027, it lapses early.
- 1 fee due Apr 15, 2027The maintenance fee for Systems and Methods for Generating Signals from Terrestrial Transmitters, and for Processing the Signals Using GNSS Receiver Hardware (US 10,444,369) comes due Apr 15, 2027. Unpaid by Oct 15, 2027, it lapses early.
- 5 fees due May 3 to 12, 2027 · next May 3
- 3 fees due Jun 12 to 26, 2027 · next Jun 12
- 2 fees due Jul 21 to 26, 2027 · next Jul 21
- 3 fees due Aug 4 to 27, 2027 · next Aug 4
- 7 fees due Sep 15 to 30, 2027 · next Sep 15
- 2 fees due Oct 26, 2027
- 1 fee due Nov 12, 2027The maintenance fee for Wide Area Positioning System (US 10,649,090) comes due Nov 12, 2027. Unpaid by May 12, 2028, it lapses early.
Recent changes
- 3 of the patents on this record were granted since Aug 16, 2026
What they patent
The 5 largest of its 65 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Wide Area Positioning System | 29 in force | to Jun 2031 |
| Systems and Methods for Calibrating Unstable Sensors | 6 in force | to Feb 2038 |
| Constraining Barometric Pressure Sensor Calibration with Sporadic Data Collection | 4 in force | to Jun 2041 |
| Systems and Methods for Extending the Spatial Coverage of a Reference Pressure Network | 4 in force | to Feb 2040 |
| Systems and Methods for Determining a Height of a Mobile Device Above a Surface | 4 in force | to Dec 2039 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,629,803 | Wide Area Positioning System In force · High confidence | In force | High confidence | |
| US 8,643,540 | Wide Area Positioning System In force · Medium confidence | In force | Medium confidence | |
| US 8,874,398 | Wide Area Positioning System In force · High confidence | In force | High confidence | |
| US 11,047,991 | Coding in a Positioning System In force · High confidence | In force | High confidence | |
| US 11,115,078 | Wide Area Positioning System In force · Medium confidence | In force | Medium confidence | |
| US 11,650,330 | Coding in a Positioning System In force · Low confidence | In force | Low confidence | |
| US 11,705,936 | Wide Area Positioning System In force · Low confidence | In force | Low confidence | |
| US 12,289,131 | Wide Area Positioning System In force · Low confidence | In force | Low confidence | |
| US 9,973,234 | Systems and Methods for Pseudo-Random Coding In force · Medium confidence | In force | Medium confidence | |
| US 10,823,856 | Cell Organization and Transmission Schemes in a Wide Area Positioning System In force · High confidence | In force | High confidence |
Also on record, not counted in the 136: 1 patent in force now held by others · 3 patents ended · 19 applications pending · 25 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.