Where does East Japan Railway Company rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), East Japan Railway Company ranks #22,495 of 50,000 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does East Japan Railway Company hold?

East Japan Railway Company holds 12 US utility patents granted between 2015 and 2021, spanning 16 technology areas.

What is East Japan Railway Company's Innovation Score?

East Japan Railway Company has an Innovation Score of 30.0 out of 100 (top 67% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is East Japan Railway Company's patent grant rate increasing or decreasing?

East Japan Railway Company's recent grant velocity is -91% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for East Japan Railway Company's patents?

East Japan Railway Company's patents average 11.7 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 East Japan Railway Company 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

East Japan Railway Company

Q: What technology areas does East Japan Railway Company focus on?

East Japan Railway Company's top technology area is B61L (GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC) with 3 patents. Grants appear in 16 CPC subclasses total.

USPTO PatentsView assignee record - 12 granted patents across 16 technology areas, recorded in grant years 2015–2021. 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: B61L (GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC).

Compiled by PlainPatent · May 15, 2026

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, East ranks #22,495 of 50,000 tracked US assignees by granted-patent volume, with 12 patents across 16 technology areas.

#22,495
of 50,000 US assignees by volume: Top 67%
by Innovation Score (30.0/100): 11.7
avg claims per patent: -91%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R22495 · Foreign Corporation #22,495 · 12 grants

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

GRANTS-MICRO 12 grants
MID-PACK #22,495/50,000
PHOTO-FINISH Earth Networks
CPC-FOCUS B61L · 16 areas
INNOV-THIN 30.0/100
CLAIMS-PAR 11.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -91% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Earth Networks, 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.

Qualcomm Incorporated · highest

85
East Japan Railway · this assignee

30
Edge Electrons · near

30
GRIP Holdings · near

30
Inventergy · near

30
E2V (uk) · near

30
3D Lighting Innovati… · lowest

7

What this shows East's Innovation Score is 30.0/100 (top 67% 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.

Where East's grants concentrate

East Japan Railway Company is a focused PatentsView assignee: 16 CPC subclasses with 25% of grants classified under B61L (GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC). Peak complete grant year is 2015 (4 grants) versus a trough of 1 in 2017. By volume, East sits between Exalos Ag and Edge Electrons Limited.

Exalos

12
Excellence OPTO

12
Earth Networks

12
Earthsystems

12
Eastern Mastec

12
Echodyne

12
Eddy Pump

12
Edge Electrons

12
East Japan Railway ◀

12

What this shows East holds 12 patents at rank #22,517, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near East

By rank, the assignees closest to #22,517 in granted patent volume.

Leaders in B61L (Guiding Railway Traffic)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for East, neither rank-band nor same-CPC leaders (those blocks stay above).

Similar innovation score

Nearest assignees by Innovation Score (30 here).

Edge Electrons Limited 30 Inventergy, Inc. 30 GRIP Holdings Llc 30 E2V Technologies (uk) Limited 30

East's Innovation Score vs. every tracked assignee

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

30 Top 67% higher than 33% of 50,000 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 · 2015–2021

Grants by year

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

View data table

East Japan Railway Company patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	4	33.3%
2016	2	16.7%
2017	1	8.3%
2018	1	8.3%
2019	3	25.0%
2021	1	8.3%

Which technologies does East Japan Railway Company patent most?

B61L - GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC 3

B60L - PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES ; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES ; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL ; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICL 3

G05D - SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES 2

B61D - BODY DETAILS OR KINDS OF RAILWAY VEHICLES 2

B08B - CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL 1

E01B - PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS 1

G01B - MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS 1

B61F - RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES 1

Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION 1

B60M - POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES 1

H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 1

G08G - TRAFFIC CONTROL SYSTEMS 1

B61G - COUPLINGS; DRAUGHT AND BUFFING APPLIANCES 1

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 1

B60R - VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR 1

Top 15 of 16 technology areas

Where it ranks

Overall rank by patents

#22,495

of 50,000 tracked assignees

Innovation Score

30.0 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

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.