36 patents currently held

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

The next term ends in Oct 2031. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Oct 2031

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

202620272028202920302031 2032 2033 203420352036 2037 203820392040 2041 2042 204320442045

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

Multi-Tunnel Electric Motor/Generator US 10,256,680

The most cited patent in this portfolio, cited by 47 later US patents, top 5% of utility patents granted in 2019 in our data. Protection runs to 2033.

Ends Mar 2033 · High confidence Also notable

Multi-Tunnel Electric Machine US 11,502,570

Cited by 18 later US patents, top 5% of utility patents granted in 2022 in our data. Protection runs to 2041.

Ends Jan 2041 · High confidence Also notable

Multi-Tunnel Electric Motor/Generator Segment US 10,476,362

Cited by 31 later US patents, top 10% of utility patents granted in 2019 in our data. Protection runs to 2037.

Ends Sep 2037 · High confidence

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 14, 2026
The maintenance fee for Magnetic Motor and Method of Use (US 10,291,096) comes due Nov 14, 2026. Unpaid by May 14, 2027, it lapses early.
5 fees due Apr 3 to 15, 2027 · next Apr 3
1 fee due May 12, 2027
The maintenance fee for Multi-Tunnel Electric Motor/Generator Segment (US 10,476,362) comes due May 12, 2027. Unpaid by Nov 12, 2027, it lapses early.
1 fee due Sep 10, 2027
The maintenance fee for Method and Apparatus for Power Generation (US 10,587,178) comes due Sep 10, 2027. Unpaid by Mar 10, 2028, it lapses early.
3 fees due Oct 23 to 26, 2027 · next Oct 23

Which patents, and when each one lapses · Pro

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

What they patent

The 5 largest of its 14 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Torque Tunnel Halbach Array Electric Machine	10 in force	to Jun 2042
DC Electric Motor/Generator with Enhanced Permanent Magnet Flux Densities	5 in force	to Oct 2034
Multi-Tunnel Electric Motor/Generator Segment	4 in force	to Sep 2037
Circumferential Flux Electric Machine with Field Weakening Mechanisms and Methods of Use	3 in force	to Apr 2038
Magnetic Motor	3 in force	to Nov 2032

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 9,325,219	Magnetic Motor and Method of Use In force Term ends Oct 21, 2031 · High confidence	In force	Term ends Oct 21, 2031	High confidence
US 10,291,096	Magnetic Motor and Method of Use In force Term ends Oct 21, 2031 · High confidence	In force	Term ends Oct 21, 2031	High confidence
US 10,587,178	Method and Apparatus for Power Generation In force Term ends Sep 12, 2032 · High confidence	In force	Term ends Sep 12, 2032	High confidence
US 8,922,070	Magnetic Motor In force Term ends Nov 24, 2032 · High confidence	In force	Term ends Nov 24, 2032	High confidence
US 10,256,680	Multi-Tunnel Electric Motor/Generator In force Term ends Mar 20, 2033 · High confidence	In force	Term ends Mar 20, 2033	High confidence
US 11,374,442	Multi-Tunnel Electric Motor/Generator In force Term ends Apr 24, 2033 · High confidence	In force	Term ends Apr 24, 2033	High confidence
US 10,263,480	Brushless Electric Motor/Generator In force Term ends Oct 29, 2033 · High confidence	In force	Term ends Oct 29, 2033	High confidence
US 10,284,029	Brushed Electric Motor/Generator In force Term ends Jan 2, 2034 · High confidence	In force	Term ends Jan 2, 2034	High confidence
US 9,325,232	Method and Apparatus for Power Generation In force Term ends Sep 6, 2034 · High confidence	In force	Term ends Sep 6, 2034	High confidence
US 9,419,483	DC Electric Motor/Generator with Enhanced Permanent Magnet Flux Densities In force Term ends Oct 8, 2034 · High confidence	In force	Term ends Oct 8, 2034	High confidence

10 of 36 patents shown.

Pro members see all 36.

Pro members: see all 36 patents

Also on record, not counted in the 36: 12 patents ended · 7 applications pending · 22 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.

Export every term end as CSV · Pro

Linear Labs, Inc.