RF DSP Inc

40 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

Nov 2033

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 Mar 17, 2027
4 fees due Apr 22 to 29, 2027 · next Apr 22
2 fees due Jun 30, 2027
1 fee due Sep 17, 2027
The maintenance fee for Beamforming in a MU-MIMO wireless communication system (US 10,594,377) comes due Sep 17, 2027. Unpaid by Mar 17, 2028, it lapses early.
1 fee due Oct 14, 2027
The maintenance fee for Distributed wireless antennas and millimeter wave scanning repeater (US 10,623,083) comes due Oct 14, 2027. Unpaid by Apr 14, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

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

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 9,813,121	Massive MIMO multi-user beamforming and single channel full duplex for wireless networks In force Ends no later than Nov 19, 2033 · From the USPTO record	In force	Ends no later than Nov 19, 2033	From the USPTO record
US 10,461,814	Massive MIMO multi-user beamforming and single channel full duplex for wireless networks In force Term ends Feb 11, 2034 · From the USPTO record	In force	Term ends Feb 11, 2034	From the USPTO record
US 9,667,330	Massive MIMO multi-user beamforming and single channel full duplex for wireless networks In force Term ends Nov 16, 2034 · From the USPTO record	In force	Term ends Nov 16, 2034	From the USPTO record
US 9,692,577	Method for acquiring channel state information in FDD MIMO wireless networks In force Term ends Dec 20, 2034 · From the USPTO record	In force	Term ends Dec 20, 2034	From the USPTO record
US 9,847,819	Adaptive precoding in a MIMO wireless communication system In force Term ends Dec 20, 2034 · From the USPTO record	In force	Term ends Dec 20, 2034	From the USPTO record
US 10,826,583	Adaptive precoding in a MIMO wireless communication system In force Term ends Dec 20, 2034 · From the USPTO record	In force	Term ends Dec 20, 2034	From the USPTO record
US 10,419,091	Adaptive precoding in a MIMO wireless communication system In force Term ends Jan 20, 2035 · From the USPTO record	In force	Term ends Jan 20, 2035	From the USPTO record
US 9,917,628	Beamforming in a MU-MIMO wireless communication system with relays In force Term ends Jan 16, 2036 · From the USPTO record	In force	Term ends Jan 16, 2036	From the USPTO record
US 9,954,591	Beamforming in a MU-MIMO wireless communication system In force Term ends Jan 16, 2036 · From the USPTO record	In force	Term ends Jan 16, 2036	From the USPTO record
US 10,171,217	Enhanced SRS for massive MIMO channel estimation In force Term ends Jan 16, 2036 · From the USPTO record	In force	Term ends Jan 16, 2036	From the USPTO record

10 of 40 patents shown.

Pro members see all 40.

Pro members: see all 40 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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