Where does ESS Tech, Inc. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), ESS Tech, Inc. ranks #3,680 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 ESS Tech, Inc. hold?

ESS Tech, Inc. holds 99 US utility patents granted between 2015 and 2025, spanning 27 technology areas.

What is ESS Tech, Inc.'s Innovation Score?

ESS Tech, Inc. has an Innovation Score of 56.1 out of 100 (top 6% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does ESS Tech, Inc. focus on?

ESS Tech, Inc.'s top technology area is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution) with 67 patents, ranking #224 of 5,963 assignees active in that subclass. Grants appear in 27 CPC subclasses total.

Is ESS Tech, Inc.'s patent grant rate increasing or decreasing?

ESS Tech, Inc.'s recent grant velocity is +79% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for ESS Tech, Inc.'s patents?

ESS Tech, Inc.'s patents average 14.6 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 ESS Tech, Inc. 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 US Corporation

ESS Tech, Inc.

USPTO PatentsView assignee record - 99 granted patents across 27 technology areas, recorded in grant years 2015–2025. 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: Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, ESS ranks #3,680 of 49,997 tracked US assignees by granted-patent volume, with 99 patents across 27 technology areas.

#3,680
of 49,997 US assignees by volume: Top 6%
by Innovation Score (56.1/100): 14.6
avg claims per patent: +79%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R3680 · US Corporation #3,680 · 99 grants

GRANTS-SMALL · TOP-DECILE · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-RICH · TYPE-USCORP · VEL-SURGE · BOOK-FULL

GRANTS-SMALL 99 grants
TOP-DECILE #3,680/49,997
PHOTO-FINISH Cooledge Lighting
CPC-FOCUS Y02E · 27 areas
INNOV-PAR 56.1/100
CLAIMS-RICH 14.6 claims/avg
TYPE-USCORP US Corporation
VEL-SURGE +79% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Cooledge Lighting 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 ESS’s 56.1 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 15.9 pts (28%) Velocity 13.0 pts (23%) Breadth 18.4 pts (33%) Claim depth 8.8 pts (16%)

Qualcomm Incorporated · highest

85
Dupont Nutrition… · near

56
Gaztransport ET… · near

56
East China Universit… · near

56
ESS Tech · this assignee

56
L3vel · near

56
3D Lighting… · lowest

7

What this shows ESS's Innovation Score is 56.1/100 (top 6% 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 ESS?

Each dot is one of ESS’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). ESS’s own 14.6 claims/patent is at or below the 14.6 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where ESS's grants concentrate

ESS Tech, Inc. is a focused PatentsView assignee: 27 CPC subclasses with 67.7% of grants classified under Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution). Peak complete grant year is 2023 (21 grants) versus a trough of 3 in 2018. By volume, ESS sits between Cooledge Lighting Inc. and National University Corporation Kobe University.

ESS's three-year grant acceleration

From 2019–2021 to 2022–2024, ESS Tech, Inc. moved from 22 to 43 grants (1.96x the prior three-year total, a multiple, not a CAGR). See the growth leaderboard.

Cooledge Lighting

99
Corteva Agriscien…

99
DR Reddy's Labora…

99
Dura Operating

99
Exel Industries

99
Fidelity Informat…

99
Jeld-wen

99
National Universi…

99
ESS Tech ◀

99

What this shows ESS holds 99 patents at rank #3,680, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near ESS

By rank, the assignees closest to #3,680 in granted patent volume.

Leaders in Y02E (Reduction OF Greenhouse GAS [GHG] Emissions)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for ESS, neither rank-band nor same-CPC leaders (those blocks stay above). In Y02E (Reduction OF Greenhouse GAS [GHG] Emissions), ESS ranks #224 of 5,963 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (56 here).

East China University of Science and Technology 56 L3vel, LLC 56 Dupont Nutrition Biosciences APS 56 Gaztransport ET Technigaz 56

Similar claim depth

Nearest assignees by average claims per patent (14.6 here).

Johnson Electric International AG 14.6 avg Conagen Inc. 14.6 avg Otsuka Pharmaceutical Co., Ltd. 14.6 avg Whirlpool Corporation 14.6 avg

ESS's Innovation Score vs. every tracked assignee

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

56 Top 6% higher than 94% 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 · 2015–2025

Grants by year

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

View data table

ESS Tech, Inc. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	8	8.1%
2016	8	8.1%
2017	8	8.1%
2018	3	3.0%
2019	6	6.1%
2020	9	9.1%
2021	7	7.1%
2022	11	11.1%
2023	21	21.2%
2024	11	11.1%
2025partial year	7	7.1%

Which technologies does ESS Tech, Inc. patent most?

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 67

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 66

H03H - Impedance Networks, e.g. Resonant CIRCUITS; Resonators 10

H04R - Loudspeakers, Microphones, Gramophone Pick-ups OR Like Acoustic Electromechanical TRANSDUCERS; Deaf-aid SETS; Public Address Systems 9

H03F - Amplifiers 8

H03M - CODING; DECODING; Code Conversion IN General 7

Y10T - Technical Subjects Covered BY Former US Classification 5

H02J - Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy 4

G06F - Electric Digital Data Processing 4

H03K - Pulse Technique 4

H03L - Automatic Control, Starting, Synchronisation OR Stabilisation OF Generators OF Electronic Oscillations OR Pulses 3

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

G05F - Systems FOR Regulating Electric OR Magnetic Variables 2

G06V - Image OR Video Recognition OR Understanding 2

H03G - Control OF Amplification 2

Top 15 of 27 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

ESS Tech, Inc.'s patent record in context - here's where to go next.

ESS Tech, Inc.'s lead technology class is Y02E (Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution), 67.7% of its portfolio - see every assignee active in that class. Explore Y02E
Ranked #3,680 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare ESS Tech, Inc. against Cooledge Lighting Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 56.1/100 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.