Where does National Railroad Passenger Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), National Railroad Passenger Corporation ranks #32,592 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 National Railroad Passenger Corporation hold?

National Railroad Passenger Corporation holds 8 US utility patents granted between 2015 and 2024, spanning 7 technology areas.

What is National Railroad Passenger Corporation's Innovation Score?

National Railroad Passenger Corporation has an Innovation Score of 30.6 out of 100 (35th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does National Railroad Passenger Corporation focus on?

National Railroad Passenger Corporation's top technology area is B61B (Railway SYSTEMS; Equipment Therefor NOT Otherwise Provided FOR) with 4 patents, ranking #33 of 107 assignees active in that subclass. Grants appear in 7 CPC subclasses total.

Is National Railroad Passenger Corporation's patent grant rate increasing or decreasing?

National Railroad Passenger Corporation's recent grant velocity is -67% 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 National Railroad Passenger Corporation's patents?

National Railroad Passenger Corporation's patents average 17.3 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.

USPTO 2015–2025 USPTO PatentsView US Corporation

National Railroad Passenger Corporation

Q: How is the National Railroad Passenger Corporation 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 PatentsView assignee record - 8 granted patents across 7 technology areas, recorded in grant years 2015–2024. 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: B61B (Railway SYSTEMS; Equipment Therefor NOT Otherwise Provided FOR).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, National ranks #32,592 of 49,997 tracked US assignees by granted-patent volume, with 8 patents across 7 technology areas.

#32,592
of 49,997 US assignees by volume: 35th percentile
by Innovation Score (30.6/100): 17.3
avg claims per patent: -67%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R32592 · US Corporation #32,592 · 8 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-RICH · TYPE-USCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 8 grants
MID-PACK #32,592/49,997
PHOTO-FINISH Nantoh
CPC-NARROW B61B · 7 areas
INNOV-THIN 30.6/100
CLAIMS-RICH 17.3 claims/avg
TYPE-USCORP US Corporation
VEL-DROP -67% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Nantoh. Co., Ltd (±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 National’s 30.6 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 (25%) Velocity 3.3 pts (11%) Breadth 9.4 pts (31%) Claim depth 10.4 pts (34%)

Qualcomm Incorporated · highest

85
National Railroad… · this assignee

31
3D Lighting… · lowest

7

What this shows National's Innovation Score is 30.6/100 (35th 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 National?

Each dot is one of National’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). National’s own 17.3 claims/patent is ABOVE the 11.3 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where National's grants concentrate

National Railroad Passenger Corporation is a focused PatentsView assignee: 7 CPC subclasses with 50% of grants classified under B61B (Railway SYSTEMS; Equipment Therefor NOT Otherwise Provided FOR). Peak complete grant year is 2016 (2 grants) versus a trough of 1 in 2015. By volume, National sits between Nantoh. Co., Ltd and Nebbiolo Technologies, Inc..

National's three-year grant acceleration

National Railroad Passenger Corporation shows 1 grants in 2022–2024 against only 2 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.

Nantoh

8
Nari Technology

8
National Cheng Ku…

8
National Deep SEA…

8
National Universi…

8
NB Health Laborat…

8
NCX

8
Nebbiolo

8
National Railroad… ◀

8

What this shows National holds 8 patents at rank #32,569, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near National

By rank, the assignees closest to #32,569 in granted patent volume.

Leaders in B61B (Railway Systems)

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

National's Innovation Score vs. every tracked assignee

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

31 35th percentile higher than 35% 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 · 2015–2024

Grants by year

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

View data table

National Railroad Passenger Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	12.5%
2016	2	25.0%
2017	1	12.5%
2018	1	12.5%
2019	1	12.5%
2021	1	12.5%
2024	1	12.5%

Which technologies does National Railroad Passenger Corporation patent most?

B61B - Railway SYSTEMS; Equipment Therefor NOT Otherwise Provided FOR 4

B61K - Auxiliary Equipment Specially Adapted FOR Railways, NOT Otherwise Provided FOR 2

B61D - Body Details OR Kinds OF Railway Vehicles 2

E01B - Permanent WAY; Permanent-way TOOLS; Machines FOR Making Railways OF ALL Kinds 1

B61L - Guiding Railway TRAFFIC; Ensuring THE Safety OF Railway Traffic 1

G06F - Electric Digital Data Processing 1

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 1

Top 7 of 7 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

National Railroad Passenger Corporation's patent record in context - here's where to go next.

National Railroad Passenger Corporation's lead technology class is B61B (Railway SYSTEMS; Equipment Therefor NOT Otherwise Provided FOR), 50% of its portfolio - see every assignee active in that class. Explore B61B
Ranked #32,592 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare National Railroad Passenger Corporation against Nantoh. Co., Ltd, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 30.6/100 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.