Also listed on Mobile Drive Technology Co.,Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Aug 1, 2033 · High confidence
20-year base term ends Aug 1, 2033
Held by Mobile Drive Netherlands B.V.
Filed Aug 1, 2013 as application 13/956,441 · Granted Dec 8, 2015
Base term, 20 years from filing
Today
2013
2033
Clock starts
Aug 1, 2013
Aug 1, 2013
Term ends
Aug 1, 2033
Aug 1, 2033
Granted
Dec 8, 2015
Dec 8, 2015
base term
fee events
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
2 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
This patent's term is its 20-year base term, with no adjustment for prosecution delay. 2 of 3 maintenance fees are paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Aug 1, 2013, when this application, 13/956,441, was filed | Aug 1, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 1, 2033 | High confidence |
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Aug 1, 2013 Reel 30921, frame 379 | Hsu, Ming-feng | Chi Mei Communication Systems, Inc. | Assignment of Assignor's Interest |
| Dec 12, 2019 Reel 51284, frame 371 | Chi Mei Communication Systems, Inc. | Chiun Mai Communication Systems, Inc. | Change of Name |
| Feb 4, 2020 Reel 51706, frame 670 | Chiun Mai Communication Systems, Inc. | Mobile Drive Technology Co.,Ltd. | Assignment of Assignor's Interest |
| Aug 31, 2021 Reel 57391, frame 564 | Mobile Drive Technology Co., Ltd. | Mobile Drive Netherlands B.V. | Assignment of Assignor's Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
What's changing
Aug 2033
Term ends Aug 1, 2033. Maintenance fees still fall due before then
Citations
7
later US patents cite this one
That is above the median of utility patents granted in 2015 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.