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52 patents currently held · Updated Nov 14, 2026

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

Ending by 2030

Jan 2027

Next term end

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

20262027202820292030203120322033203420352036203720382039204020412042204320442045

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.

2 fees due Apr 15 to 22, 2027 · next Apr 15
1 fee due May 7, 2027
The maintenance fee for Electromechanical Lock Utilizing Magnetic Field Forces (US 11,808,057) comes due May 7, 2027. Unpaid by Nov 8, 2027, it lapses early.
1 fee due Sep 19, 2027
The maintenance fee for Digital Lock (US 11,933,073) comes due Sep 19, 2027. Unpaid by Mar 20, 2028, it lapses early.
1 fee due Nov 5, 2027
The maintenance fee for Electromagnetic actuator (US 10,641,008) comes due Nov 5, 2027. Unpaid by May 5, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

3 of the patents on this record were granted since Aug 16, 2026

Patents held now

Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.

Patent	Title	Status	Expires	Confidence
US 8,866,439	Electromechanical lock and its operation method using mechanical power from normal operation for setting electromechanical lock in a mechanically openable state In force Term ends Jan 20, 2027 · From the USPTO record	In force	Term ends Jan 20, 2027	From the USPTO record
US 8,468,861	Electromechanical lock and its key In force Term ends Oct 14, 2028 · From the USPTO record	In force	Term ends Oct 14, 2028	From the USPTO record
US 8,228,030	Electromechanical lock with threshold device to control power transmission mechanism thereof and its operation method In force Term ends Jan 4, 2029 · From the USPTO record	In force	Term ends Jan 4, 2029	From the USPTO record
US 8,899,081	Electromechanical lock In force Term ends Feb 20, 2030 · From the USPTO record	In force	Term ends Feb 20, 2030	From the USPTO record
US 8,516,250	Lock administration system In force Term ends Mar 8, 2030 · From the USPTO record	In force	Term ends Mar 8, 2030	From the USPTO record
US 8,981,899	Electromechanical Lock In force Term ends Apr 1, 2030 · High confidence	In force	Term ends Apr 1, 2030	High confidence
US 8,581,690	Electromechanical lock In force Term ends Feb 25, 2032 · From the USPTO record	In force	Term ends Feb 25, 2032	From the USPTO record
US 9,406,178	Electromechanical lock In force Term ends Feb 27, 2033 · From the USPTO record	In force	Term ends Feb 27, 2033	From the USPTO record
US 9,574,376	Electromechanical lock In force Term ends Nov 21, 2033 · From the USPTO record	In force	Term ends Nov 21, 2033	From the USPTO record
US 10,443,269	Electromechanical lock utilizing magnetic field forces In force Term ends Oct 17, 2036 · From the USPTO record	In force	Term ends Oct 17, 2036	From the USPTO record

10 of 52 patents shown.

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Pro members: see all 52 patents

Sources and methods

Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand. How this record was built

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

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Published applications

US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.

1 abandoned · 2 no status recorded

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