Where does E2 Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), E2 Limited ranks #31,475 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 E2 Limited hold?

E2 Limited holds 8 US utility patents granted between 2015 and 2022, spanning 3 technology areas.

What is E2 Limited's Innovation Score?

E2 Limited has an Innovation Score of 20.4 out of 100 (7th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is E2 Limited's patent grant rate increasing or decreasing?

E2 Limited's recent grant velocity is +67% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for E2 Limited's patents?

E2 Limited's patents average 8.4 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 E2 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

E2 Limited

Q: What technology areas does E2 Limited focus on?

E2 Limited's top technology area is A61F (Filters Implantable Into Blood VESSELS; PROSTHESES; Devices Providing Patency TO, OR Preventing Collapsing OF, Tubular Structures OF THE Body, e.g. STENTS; Orthopaedic, Nursing OR Contraceptive DEVICES; FOMENTATION; Treatment OR Protection OF Eyes OR EARS; Bandages, Dressings OR Absorbent PADS; Firs) with 3 patents, ranking #1,627 of 3,082 assignees active in that subclass. Grants appear in 3 CPC subclasses total.

USPTO PatentsView assignee record - 8 granted patents across 3 technology areas, recorded in grant years 2015–2022. 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: A61F (Filters Implantable Into Blood VESSELS; PROSTHESES; Devices Providing Patency TO, OR Preventing Collapsing OF, Tubular Structures OF THE Body, e.g. STENTS; Orthopaedic, Nursing OR Contraceptive Device).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, E2 ranks #31,475 of 49,997 tracked US assignees by granted-patent volume, with 8 patents across 3 technology areas.

#31,475
of 49,997 US assignees by volume: 7th percentile
by Innovation Score (20.4/100): 8.4
avg claims per patent: +67%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R31475 · Foreign Corporation #31,475 · 8 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-PAR · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-MICRO 8 grants
MID-PACK #31,475/49,997
PHOTO-FINISH Dürr Ecoclean
CPC-NARROW A61F · 3 areas
INNOV-THIN 20.4/100
CLAIMS-PAR 8.4 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +67% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Dürr Ecoclean GmbH (±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 E2’s 20.4 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 7.6 pts (37%) Velocity 1.7 pts (8%) Breadth 6.1 pts (30%) Claim depth 5.0 pts (25%)

Qualcomm Incorporated · highest

85
E2 · this assignee

20
3D Lighting… · lowest

7

What this shows E2's Innovation Score is 20.4/100 (7th percentile 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 E2?

Each dot is one of E2’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). E2’s own 8.4 claims/patent is ABOVE the 8.1 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

E2 vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where E2's grants concentrate

E2 Limited is a focused PatentsView assignee: 3 CPC subclasses with 37.5% of grants classified under A61F (Filters Implantable Into Blood VESSELS; PROSTHESES; Devices Providing Patency TO, OR Preventing Collapsing OF, Tubular Structures OF THE Body, e.g. STENTS; Orthopaedic, Nursing OR Contraceptive Device). Peak complete grant year is 2015 (2 grants) versus a trough of 1 in 2016. By volume, E2 sits between Dürr Ecoclean GmbH and EB IP Lybrido B.V..

E2's three-year grant acceleration

E2 Limited shows 1 grants in 2022–2024 against only 4 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.

Dürr Ecoclean

8
E-motor USA

8
E-Z Bead

8
E I Spectra

8
Easelink

8
Eastern Global

8
Easybaby Products

8
EB IP Lybrido B V

8
E2 ◀

8

What this shows E2 holds 8 patents at rank #31,475, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near E2

By rank, the assignees closest to #31,475 in granted patent volume.

Leaders in A61F (Filters Implantable Into Blood Vessels)

Other assignees with the most granted patents in E2's primary technology class.

E2's Innovation Score vs. every tracked assignee

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

20 7th percentile higher than 7% 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 · 2015–2022

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

E2 Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	25.0%
2016	1	12.5%
2020	2	25.0%
2021	2	25.0%
2022	1	12.5%

Which technologies does E2 Limited patent most?

A61F - Filters Implantable Into Blood VESSELS; PROSTHESES; Devices Providing Patency TO, OR Preventing Collapsing OF, Tubular Structures OF THE Body, e.g. STENTS; Orthopaedic, Nursing OR Contraceptive DEVICES; FOMENTATION; Treatment OR Protection OF Eyes OR EARS; Bandages, Dressings OR Absorbent PADS; Firs 3

A61M - Devices FOR Introducing Media Into, OR Onto, THE Body ; Devices FOR Transducing Body Media OR FOR Taking Media From THE Body ; Devices FOR Producing OR Ending Sleep OR Stupor 2

A61B - DIAGNOSIS; SURGERY; Identification 1

Top 3 of 3 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

E2 Limited's patent record in context - here's where to go next.

E2 Limited's lead technology class is A61F (Filters Implantable Into Blood VESSELS; PROSTHESES; Devices Providing Patency TO, OR Preventing Collapsing OF, Tubular Structures OF THE Body, e.g. STENTS; Orthopaedic, Nursing OR Contraceptive Device), 37.5% of its portfolio - see every assignee active in that class. Explore A61F
Ranked #31,475 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare E2 Limited against Dürr Ecoclean GmbH, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 20.4/100 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.