USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Korea Railroad Research Institute

USPTO PatentsView assignee record - 42 granted patents across 59 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: B61L (GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

11.8

Avg claims per patent

-17%

5-year filing velocity

The verdict

Korea holds 42 US patents across 59 technology areas, rank #7,727 of 50,000 tracked assignees.

#7,727
of 50,000 US assignees by volume: Top 9%
by Innovation Score (53.4/100): 11.8
avg claims per patent: -17%
filing velocity, last 5 yrs

Portfolio overview

Korea Railroad Research Institute has been granted 42 US utility patents between 2015 and 2025, placing Korea Railroad Research Institute at rank #7,727 across all assignees tracked by PlainPatent. This portfolio spans 59 distinct Cooperative Patent Classification (CPC) subclasses, averaging 11.8 claims per patent with primary concentration in B61L (GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC). As a Foreign Corporation, Korea Railroad Research Institute is one of the broader-portfolio assignees in the PatentsView dataset. By volume, Korea sits between JRD Communication Inc. (42 patents, rank #7,723) and Landa Labs (2012) Ltd. (42 patents, rank #7,731) - the closest US assignees by grant volume. The composite Innovation Score of 53.4/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 19 grants, compared with 23 in the 2015–2019 window, a -17% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. Korea Railroad Research Institute's 11.8 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 59 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Korea Railroad Research Institute against peers pursuing similar technology classes.

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.

Korea's Innovation Score vs. every tracked assignee

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

53 Top 9% higher than 91% 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 · 2015–2025

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%
2025	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

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#7,727

Across all tracked assignees

Innovation Score

53.4 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does Korea Railroad Research Institute hold?

Korea Railroad Research Institute holds 42 US granted patents filed 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. This composite metric weighs portfolio volume (40%), filing 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. The company has filed patents in 59 CPC subclasses total.

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

Korea Railroad Research Institute's recent filing velocity is -17% compared to the prior five-year period. Filing 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 relatively simple claim structure, typical for focused inventions.

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.

How to use this portfolio

Korea's 42 grants land it in the top 9% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - Korea ranks #7,727 of 50,000. Top 50 holders
Most of this portfolio concentrates in B61L - see who else leads that technology area. B61L leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

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

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 byPlainPatent Editorial, US Patent Intelligence Editorial Team · 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.