The record carries a change of name to this company from Hitachi Automotive Systems, Ltd., 2,990 recordings between Mar 10, 2021 and Feb 1, 2024. That name keeps its own page for the records filed under it.
3,520 patents currently held
25 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 Nov 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
280
Ending by 2030
Nov 2026
Next term end
3,343
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 Aug 2038 · High confidence
Also notable
Ends Aug 2028 · High confidence
Also notable
Ends Sep 2029 · High confidence
Damping Force Generating Mechanism, Manufacturing Method for Damping Force Generating Mechanism, and Pressure Shock Absorber
US 11,603,900
Cited by 7 later US patents, top 10% of utility patents granted in 2023 in our data. Protection runs to 2038.
Vehicle Control System
US 7,630,807
Cited by 86 later US patents, top 10% of utility patents granted in 2009 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.
Electric Power Conversion Apparatus
US 7,978,471
Cited by 40 later US patents, top 25% of utility patents granted in 2011 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2029.
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.
- 5 fees due Nov 14 to 30, 2026 · next Nov 14
- 48 fees due Dec 2 to 30, 2026 · next Dec 2
- 50 fees due Jan 2 to 30, 2027 · next Jan 2
- 61 fees due Feb 1 to 28, 2027 · next Feb 1
- 80 fees due Mar 1 to 29, 2027 · next Mar 1
- 63 fees due Apr 1 to 30, 2027 · next Apr 1
- 52 fees due May 3 to 28, 2027 · next May 3
- 62 fees due Jun 1 to 30, 2027 · next Jun 1
- 64 fees due Jul 2 to 30, 2027 · next Jul 2
- 53 fees due Aug 4 to 27, 2027 · next Aug 4
- 69 fees due Sep 1 to 30, 2027 · next Sep 1
- 59 fees due Oct 2 to 30, 2027 · next Oct 2
- 23 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- Oct 15Assignment recorded on 1 record: Takaya, Nobuyuki and 2 others to Hitachi Astemo, Ltd. Recorded Oct 15, 2026, executed Apr 15, 2024. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76396, frame 22.
- Sep 24Assignment recorded on 1 record: Irie, Kota and 3 others to Hitachi Astemo, Ltd. Recorded Sep 24, 2026, executed Mar 28, 2024. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76137, frame 70.
- 86 of the patents on this record were granted since Aug 16, 2026
- 42 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 3,343 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Power Conversion Apparatus and Electric Vehicle | 7 in force | to Apr 2030 |
| Electric Power Conversion Apparatus | 7 in force | to Sep 2029 |
| Propeller Shaft and Yoke Structure of Universal Joint Used for the Propeller Shaft | 5 in force | to May 2034 |
| Mechanism for Restraining Fuel Pressure Pulsation and High Pessure Fuel Supply Pump of Internal Combustion Engine with Such Mechanism | 5 in force | to Jan 2032 |
| Electric Machine with Q-Offset Grooved Interior-Magnet Rotor and Vehicle | 5 in force | to Mar 2031 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,456,603 | Phase Detection Circuit, Resolver/Digital Converter Using the Circuit, and Control System Using the Converter In force · High confidence | In force | High confidence | |
| US 7,520,260 | Multistage Fuel-Injection Internal Combustion Engine In force · High confidence | In force | High confidence | |
| US 7,444,985 | Apparatus and Method for Controlling Ignition Timing of Internal Combustion Engine In force · High confidence | In force | High confidence | |
| US 7,514,784 | Electronic Circuit Device and Production Method of the Same In force · High confidence | In force | High confidence | |
| US 7,766,131 | Disk Brake In force · High confidence | In force | High confidence | |
| US D674,300 | Portion of Physical Amount Sensor for Air In force · High confidence | In force | High confidence | |
| US D674,301 | Physical Amount Sensor for Air In force · High confidence | In force | High confidence | |
| US D674,303 | Physical Amount Sensor for Air In force · High confidence | In force | High confidence | |
| US 7,655,122 | Oxygen Concentration Detecting Element In force · High confidence | In force | High confidence | |
| US 7,969,735 | Power Converter In force · High confidence | In force | High confidence |
Also on record, not counted in the 3,520: 25 patents in force now held by others · 940 patents ended · 387 applications pending · 267 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.