0 patents currently held, every record listed here
3 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.
This portfolio holds none of the 3 US patents in force on its record. from the record
Of the 3 now held by other companies, 3 name Tungsten Automation Corporation as their current owner. Each row says so.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
none
Next term end
When these terms end
Each bar runs from grant to computed term end. 2011 to 2028.
US 8,897,511
Method and Device for Detecting a Hand-Written Signature or Mark and for Recognising the Authenticity of Said Signature or Mark
Jan 5, 2028
US 7,889,889
Method and Device for Registering a Handwritten Personal Signature and for Recognizing the Authenticity of the Signature
Jun 16, 2028
20152019202320272028
Every computed term in this portfolio is shown above.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 patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
None of the currently held patents qualifies as notable.
Formerly held, still cited
Notable
Ends Jun 2028 · High confidence
Renewed at every maintenance window since the 2011 grant; no more fees are due before its term ends in 2028.
now held by Tungsten Automation Corporation
Also notable
Ends Sep 2028 · High confidence
Renewed at every maintenance window since the 2012 grant; no more fees are due before its term ends in 2028.
now held by Tungsten Automation Corporation
Fee deadlines
No maintenance fee falls due on this company's record before Nov 10, 2027.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
Patents held now
Soonest term end first.
Also on record: 3 patents in force now held by others. 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.