87 patents currently held
17 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.
79 more records may belong here and await a decision; they are not counted.
The next term ends in Apr 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
37
Ending by 2030
Apr 2027
Next term end
64
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 Nov 2027 · High confidence
Also notable
Ends Feb 2030 · Medium confidence
Also notable
Ends Dec 2029 · High confidence
Location Aware Content Using Presence Information Data Formation with Location Object (PIDF-LO)
US 8,185,567
Cited by 312 later US patents, top 1% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2027. A terminal disclaimer caps this term to an earlier patent's.
GNSS Long-Code Acquisition, Ambiguity Resolution, and Signal Validation
US 9,658,341
Cited by 174 later US patents, top 5% of utility patents granted in 2017 in our data, and renewed at every maintenance window due so far. Protection runs to 2030.
Emergency 911 Data Messaging
US 8,185,087
Cited by 140 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 2029.
Formerly held, still cited
Notable
Ends Aug 2033 · High confidence
Cited by 260 later US patents, top 1% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2033.
now held by Artax, LLC
Also notable
Ends Feb 2028 · High confidence
Cited by 242 later US patents, top 5% of utility patents granted in 2011 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.
now held by American SLS Manager Technologies LLC
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.
- 2 fees due Mar 8, 2027
- 1 fee due Apr 13, 2027The maintenance fee for Alphanumeric Address Mapping for Non-Homogeneous Short Message Networks (US 9,161,184) comes due Apr 13, 2027. Unpaid by Oct 13, 2027, it lapses early.
- 3 fees due May 3 to 17, 2027 · next May 3
- 4 fees due Jun 1 to 8, 2027 · next Jun 1
- 2 fees due Aug 2 to 23, 2027 · next Aug 2
- 4 fees due Sep 1 to 22, 2027 · next Sep 1
- 6 fees due Oct 5 to 26, 2027 · next Oct 5
Recent changes
- 6 terms have ended since Aug 17, 2026
What they patent
The 5 largest of its 64 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| System and Method for Preventing A-GPS Devices from Searching for Specific Satellites | 8 in force | to Jan 2033 |
| Enhanced E911 Network Access for Call Centers | 4 in force | to Jul 2031 |
| Unique Global Identifier Header for Minimizing Prank Emergency 911 Calls | 3 in force | to Oct 2032 |
| Emergency 911 Data Messaging | 3 in force | to Dec 2029 |
| Ancillary Data Support in Session Initiation Protocol (SIP) Messaging | 3 in force | to Aug 2029 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,511,662 | System and Method for Positioning in Configured Environments In force · High confidence | In force | High confidence | |
| US 8,150,363 | Enhanced E911 Network Access for Call Centers In force · Medium confidence | In force | Medium confidence | |
| US 8,185,567 | Location Aware Content Using Presence Information Data Formation with Location Object (PIDF-LO) In force · High confidence | In force | High confidence | |
| US 9,467,560 | End-to-End Logic Tracing of Complex Call Flows in a Distributed Call System In force · Medium confidence | In force | Medium confidence | |
| US 9,554,245 | Dynamic Configuration of Mobile Station Location Services In force · High confidence | In force | High confidence | |
| US 7,928,903 | Method and System for Selecting Optimal Satellites for A-GPS Location of Handsets in Wireless Networks In force · Medium confidence | In force | Medium confidence | |
| US 9,131,357 | Emergency 911 Data Messaging In force · Medium confidence | In force | Medium confidence | |
| US 9,467,826 | Emergency 911 Data Messaging In force · Medium confidence | In force | Medium confidence | |
| US 8,378,888 | System and Method for Determining the Location of a Mobile Device In force · High confidence | In force | High confidence | |
| US 8,325,087 | System and Method for Server Side Detection of Falsified Satellite Measurements In force · High confidence | In force | High confidence |
Also on record, not counted in the 87: 17 patents in force now held by others · 395 patents ended · 218 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.