382 patents currently held
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.
12 more records may belong here and await a decision; they are not counted.
The next term ends in Nov 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
55
Ending by 2030
Nov 2026
Next term end
204
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 Nov 2031 · Medium confidence
Also notable
Ends Mar 2033 · Medium confidence
Also notable
Ends May 2033 · High confidence
Internal Combustion Engine Including Starting System Powered by Lithium-Ion Battery
US 9,127,658
The most cited patent in this portfolio, cited by 86 later US patents, top 5% of utility patents granted in 2015 in our data. Protection runs to 2031.
Zero-Turn Radius Lawnmower with Suspension System
US 9,849,776
Cited by 47 later US patents, top 10% of utility patents granted in 2017 in our data, and renewed at every maintenance window due so far. Protection runs to 2033.
Vertically Storable Engine and Mower
US 9,462,747
Cited by 51 later US patents, top 10% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2033.
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.
- 1 fee due Nov 26, 2026The maintenance fee for Tractors Including Automatic Reset of a Power Takeoff Circuit (US 9,038,490) comes due Nov 26, 2026. Unpaid by May 26, 2027, it lapses early.
- 7 fees due Dec 6 to 25, 2026 · next Dec 6
- 6 fees due Jan 4 to 25, 2027 · next Jan 4
- 6 fees due Feb 1 to 27, 2027 · next Feb 1
- 6 fees due Mar 3 to 26, 2027 · next Mar 3
- 2 fees due Apr 15 to 20, 2027 · next Apr 15
- 8 fees due May 5 to 28, 2027 · next May 5
- 4 fees due Jun 5 to 29, 2027 · next Jun 5
- 7 fees due Jul 2 to 30, 2027 · next Jul 2
- 10 fees due Aug 4 to 27, 2027 · next Aug 4
- 5 fees due Sep 8 to 24, 2027 · next Sep 8
- 5 fees due Oct 12 to 28, 2027 · next Oct 12
- 1 fee due Nov 12, 2027The maintenance fee for Outdoor Power Equipment Suspension System (US 10,645,874) 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
- 6 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 204 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Starter System for an Engine | 14 in force | to Nov 2032 |
| Zero-Turn Radius Lawnmower with Suspension System | 11 in force | to Jun 2033 |
| Automatic Engine Speed Adjustment | 10 in force | to Apr 2034 |
| Electric Starter Battery for Large Engines | 6 in force | to Jan 2038 |
| Hood Having External Helical Configuration, For Use As Part Of Debris-Collecting Apparatus | 6 in force | to Sep 2034 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US D671,559 | Engine In force · High confidence | In force | High confidence | |
| US D673,980 | Recoil Starter Cover In force · High confidence | In force | High confidence | |
| US D679,289 | Air Cleaner In force · High confidence | In force | High confidence | |
| US 7,594,484 | Blower Housing for Internal Combustion Engine In force · High confidence | In force | High confidence | |
| US D685,897 | Air Filter In force · High confidence | In force | High confidence | |
| US D688,628 | Frame for Outdoor Power Equipment In force · High confidence | In force | High confidence | |
| US D688,841 | Pressure Washer Frame In force · High confidence | In force | High confidence | |
| US D689,522 | Engine In force · High confidence | In force | High confidence | |
| US D691,177 | Cover for an Engine In force · High confidence | In force | High confidence | |
| US D696,196 | Standby Generator In force · High confidence | In force | High confidence |
Also on record, not counted in the 382: 3 patents in force now held by others · 151 patents ended · 57 applications pending · 66 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.