Where does Korea Railroad Research Institute rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Korea Railroad Research Institute ranks #7,728 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 Korea Railroad Research Institute hold?

Korea Railroad Research Institute holds 42 US utility patents granted between 2015 and 2025, spanning 59 technology areas.

What is Korea Railroad Research Institute's Innovation Score?

Korea Railroad Research Institute has an Innovation Score of 53.4 out of 100 (top 9% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Korea Railroad Research Institute focus on?

Korea Railroad Research Institute's top technology area is B61L (Guiding Railway TRAFFIC; Ensuring THE Safety OF Railway Traffic) with 13 patents, ranking #28 of 195 assignees active in that subclass. Grants appear in 59 CPC subclasses total.

Is Korea Railroad Research Institute's patent grant rate increasing or decreasing?

Korea Railroad Research Institute's recent grant velocity is -35% 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 Korea Railroad Research Institute's patents?

Korea Railroad Research Institute's patents average 11.8 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 Korea Railroad Research Institute 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

Korea Railroad Research Institute

USPTO PatentsView assignee record - 42 granted patents across 59 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: B61L (Guiding Railway TRAFFIC; Ensuring THE Safety OF Railway Traffic).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Korea ranks #7,728 of 49,997 tracked US assignees by granted-patent volume, with 42 patents across 59 technology areas.

#7,728
of 49,997 US assignees by volume: Top 9%
by Innovation Score (53.4/100): 11.8
avg claims per patent: -35%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R7728 · Foreign Corporation #7,728 · 42 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-WIDE · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-SMALL 42 grants
UPPER-Q #7,728/49,997
PHOTO-FINISH JRD Communication
CPC-WIDE B61L · 59 areas
INNOV-PAR 53.4/100
CLAIMS-PAR 11.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -35% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: JRD Communication 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 Korea’s 53.4 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 13.0 pts (24%) Velocity 8.3 pts (16%) Breadth 25.0 pts (47%) Claim depth 7.1 pts (13%)

Qualcomm Incorporated · highest

85
Envoy Medical · near

53
Idemia Identity &… · near

53
JSW Aktina System · near

53
Korea Railroad… · this assignee

53
Moldex-Metric · near

53
3D Lighting… · lowest

7

What this shows Korea's Innovation Score is 53.4/100 (top 9% 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 Korea?

Each dot is one of Korea’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). Korea’s own 11.8 claims/patent is at or below the 12.7 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

How Korea's grant cadence moved

Between 2020–2024, Korea Railroad Research Institute received 15 grants versus 23 in 2015–2019 (-35% equal-window velocity, below median growth). Across complete PatentsView years, output peaked in 2018 at 7 grants and bottomed in 2021 at 2. Lead class B61L accounts for 31% of the portfolio across 59 subclasses. Volume neighbours: JRD Communication Inc. (#7,723) and Landa Labs (2012) Ltd. (#7,731).

Korea's three-year grant acceleration

Korea Railroad Research Institute shows 10 grants in 2022–2024 against only 8 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.

JRD Communication

42
K-fee System

42
Kokuyo

42
Kong

42
Kichler Lighting

42
LGS Innovations

42
LIH Yann Industri…

42
Landa Labs (2012)

42
Korea Railroad Re… ◀

42

What this shows Korea holds 42 patents at rank #7,727, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Korea

By rank, the assignees closest to #7,727 in granted patent volume.

Leaders in B61L (Guiding Railway Traffic)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Korea, neither rank-band nor same-CPC leaders (those blocks stay above). In B61L (Guiding Railway Traffic), Korea ranks #28 of 195 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (53 here).

Moldex-Metric, Inc. 53 Envoy Medical Corporation 53 JSW Aktina System Co., Ltd. 53 Idemia Identity & Security France 53

Korea's Innovation Score vs. every tracked assignee

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

53 Top 9% higher than 91% 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

Korea Railroad Research Institute patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	3	7.1%
2016	5	11.9%
2017	5	11.9%
2018	7	16.7%
2019	3	7.1%
2020	3	7.1%
2021	2	4.8%
2022	2	4.8%
2023	5	11.9%
2024	3	7.1%
2025partial year	4	9.5%

Which technologies does Korea Railroad Research Institute patent most?

B61L - Guiding Railway TRAFFIC; Ensuring THE Safety OF Railway Traffic 13

B61B - Railway SYSTEMS; Equipment Therefor NOT Otherwise Provided FOR 7

G01S - Radio DIRECTION-FINDING; Radio NAVIGATION; Determining Distance OR Velocity BY USE OF Radio WAVES; Locating OR Presence-detecting BY USE OF THE Reflection OR Reradiation OF Radio WAVES; Analogous Arrangements Using Other Waves 6

B65D - Containers FOR Storage OR Transport OF Articles OR Materials, e.g. Bags, Barrels, Bottles, Boxes, Cans, Cartons, Crates, Drums, Jars, Tanks, Hoppers, Forwarding CONTAINERS; Accessories, Closures, OR Fittings THEREFOR; Packaging ELEMENTS; Packages 5

G01M - Testing Static OR Dynamic Balance OF Machines OR STRUCTURES; Testing OF Structures OR Apparatus, NOT Otherwise Provided FOR 5

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 4

B61H - Brakes OR Other Retarding Devices Specially Adapted FOR Rail VEHICLES; Arrangement OR Disposition Thereof IN Rail Vehicles 4

H02K - Dynamo-electric Machines 4

H04Q - Selecting 3

B61K - Auxiliary Equipment Specially Adapted FOR Railways, NOT Otherwise Provided FOR 3

Y02T - Climate Change Mitigation Technologies Related TO Transportation 3

B61D - Body Details OR Kinds OF Railway Vehicles 3

B66D - CAPSTANS; WINCHES; Tackles, e.g. Pulley BLOCKS; Hoists 2

B62B - Hand-propelled Vehicles, e.g. Hand Carts OR PERAMBULATORS; Sledges 2

E21F - Safety Devices, Transport, Filling-up, Rescue, Ventilation, OR Draining IN OR OF Mines OR Tunnels 2

Top 15 of 59 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

Korea Railroad Research Institute's patent record in context - here's where to go next.

Korea Railroad Research Institute's lead technology class is B61L (Guiding Railway TRAFFIC; Ensuring THE Safety OF Railway Traffic), 31% of its portfolio - see every assignee active in that class. Explore B61L
Ranked #7,728 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Korea Railroad Research Institute against JRD Communication Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 53.4/100 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.