Where does Dolphin N2 Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Dolphin N2 Limited ranks #24,212 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Dolphin N2 Limited hold?

Dolphin N2 Limited holds 11 US utility patents granted between 2021 and 2024, spanning 8 technology areas.

What is Dolphin N2 Limited's Innovation Score?

Dolphin N2 Limited has an Innovation Score of 50.1 out of 100 (top 13% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Dolphin N2 Limited focus on?

Dolphin N2 Limited's top technology area is F02B (Internal-combustion Piston ENGINES; Combustion Engines IN General) with 11 patents, ranking #91 of 496 assignees active in that subclass. Grants appear in 8 CPC subclasses total.

Is Dolphin N2 Limited's patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Dolphin N2 Limited.

What does claim depth mean for Dolphin N2 Limited's patents?

Dolphin N2 Limited's patents average 19.3 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

How is the Dolphin N2 Limited patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Dolphin N2 Limited

USPTO PatentsView assignee record - 11 granted patents across 8 technology areas, recorded in grant years 2021–2024. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: F02B (Internal-combustion Piston ENGINES; Combustion Engines IN General).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Dolphin ranks #24,212 of 49,997 tracked US assignees by granted-patent volume, with 11 patents across 8 technology areas.

#24,212
of 49,997 US assignees by volume: Top 13%
by Innovation Score (50.1/100): 19.3
avg claims per patent

USPTO PatentsView assignee plate

Corpus R24212 · Foreign Corporation #24,212 · 11 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-PAR · CLAIMS-RICH · TYPE-FRNCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 11 grants
MID-PACK #24,212/49,997
PHOTO-FINISH Digital Fountain
CPC-NARROW F02B · 8 areas
INNOV-PAR 50.1/100
CLAIMS-RICH 19.3 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2021–2024 · 4y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Digital Fountain, Inc. (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Dolphin’s 50.1 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 8.6 pts (17%) Velocity 20.0 pts (40%) Breadth 10.0 pts (20%) Claim depth 11.6 pts (23%)

Qualcomm Incorporated · highest

85
Dolphin N2 · this assignee

50
3D Lighting… · lowest

7

What this shows Dolphin's Innovation Score is 50.1/100 (top 13% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Dolphin?

Each dot is one of Dolphin’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Dolphin’s own 19.3 claims/patent is ABOVE the 13.4 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

Dolphin vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where Dolphin's grants concentrate

Dolphin N2 Limited is a focused PatentsView assignee: 8 CPC subclasses with 100% of grants classified under F02B (Internal-combustion Piston ENGINES; Combustion Engines IN General). Peak complete grant year is 2022 (4 grants) versus a trough of 2 in 2021. By volume, Dolphin sits between Digital Fountain, Inc. and Dr. Hielscher GmbH.

Dolphin's three-year grant acceleration

Dolphin N2 Limited shows 9 grants in 2022–2024 against only 2 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Digital Fountain

11
Disruptive Resear…

11
Divert

11
Dolby Laboratories

11
Domaille Engineer…

11
Dongguan Mimao Te…

11
Doubleme

11
Dr Hielscher

11
Dolphin N2 ◀

11

What this shows Dolphin holds 11 patents at rank #24,217, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Dolphin

By rank, the assignees closest to #24,217 in granted patent volume.

Leaders in F02B (Internal-combustion Piston Engines)

Other assignees with the most granted patents in Dolphin's primary technology class.

Dolphin's Innovation Score vs. every tracked assignee

Composite of portfolio volume, grant velocity, technology breadth, and claim depth (0–100)

50 Top 13% higher than 87% of 49,997 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2021–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2021–2019 baseline. Full figures in the table below.

View data table

Dolphin N2 Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2021	2	18.2%
2022	4	36.4%
2023	2	18.2%
2024	3	27.3%

Which technologies does Dolphin N2 Limited patent most?

F02B - Internal-combustion Piston ENGINES; Combustion Engines IN General 11

F02M - Supplying Combustion Engines IN General With Combustible Mixtures OR Constituents Thereof 9

F02D - Controlling Combustion Engines 9

Y02T - Climate Change Mitigation Technologies Related TO Transportation 7

F01P - Cooling OF Machines OR Engines IN GENERAL; Cooling OF Internal-combustion Engines 4

F02F - Cylinders, Pistons OR Casings, FOR Combustion ENGINES; Arrangements OF Sealings IN Combustion Engines 3

F01N - Gas-flow Silencers OR Exhaust Apparatus FOR Machines OR Engines IN GENERAL; Gas-flow Silencers OR Exhaust Apparatus FOR Internal-combustion Engines 3

B01D - Separation 2

Top 8 of 8 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Dolphin N2 Limited's patent record in context - here's where to go next.

Dolphin N2 Limited's lead technology class is F02B (Internal-combustion Piston ENGINES; Combustion Engines IN General), 100% of its portfolio - see every assignee active in that class. Explore F02B
Ranked #24,212 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Dolphin N2 Limited against Digital Fountain, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 50.1/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled by PlainPatent, US Patent Intelligence Editorial Process · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.