Where does Ironburg Inventions Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Ironburg Inventions Limited ranks #5,950 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 Ironburg Inventions Limited hold?

Ironburg Inventions Limited holds 57 US utility patents granted between 2015 and 2025, spanning 3 technology areas.

What is Ironburg Inventions Limited's Innovation Score?

Ironburg Inventions Limited has an Innovation Score of 32.2 out of 100 (40th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Ironburg Inventions Limited's patent grant rate increasing or decreasing?

Ironburg Inventions Limited's recent grant velocity is +0% compared to the prior five-year period (grant years, not application filing dates). The company is maintaining or growing its granted-patent output.

What does claim depth mean for Ironburg Inventions Limited's patents?

Ironburg Inventions Limited's patents average 15.0 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 Ironburg Inventions Limited 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

Ironburg Inventions Limited

Q: What technology areas does Ironburg Inventions Limited focus on?

Ironburg Inventions Limited's top technology area is A63F (Card, Board, OR Roulette GAMES; Indoor Games Using Small Moving Playing BODIES; Video GAMES; Games NOT Otherwise Provided FOR) with 43 patents, ranking #46 of 894 assignees active in that subclass. Grants appear in 3 CPC subclasses total.

USPTO PatentsView assignee record - 57 granted patents across 3 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: A63F (Card, Board, OR Roulette GAMES; Indoor Games Using Small Moving Playing BODIES; Video GAMES; Games 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, Ironburg ranks #5,950 of 49,997 tracked US assignees by granted-patent volume, with 57 patents across 3 technology areas.

#5,950
of 49,997 US assignees by volume: 40th percentile
by Innovation Score (32.2/100): 15.0
avg claims per patent: +0%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R5950 · Foreign Corporation #5,950 · 57 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-RICH · TYPE-FRNCORP · VEL-FLAT · BOOK-FULL

GRANTS-SMALL 57 grants
UPPER-Q #5,950/49,997
PHOTO-FINISH Hitachi Construction…
CPC-NARROW A63F · 3 areas
INNOV-THIN 32.2/100
CLAIMS-RICH 15.0 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-FLAT +0% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Hitachi Construction Machinery Tierra 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 Ironburg’s 32.2 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 14.0 pts (43%) Velocity 3.1 pts (10%) Breadth 6.1 pts (19%) Claim depth 9.0 pts (28%)

Qualcomm Incorporated · highest

85
American Orthodontics · near

32
Ampio Pharmaceuticals · near

32
Dyaco International · near

32
Ironburg Inventions · this assignee

32
Maquet Cardiopulmonary · near

32
3D Lighting… · lowest

7

What this shows Ironburg's Innovation Score is 32.2/100 (40th 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 Ironburg?

Each dot is one of Ironburg’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). Ironburg’s own 15.0 claims/patent is ABOVE the 11.1 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Ironburg's grants concentrate

Ironburg Inventions Limited is a focused PatentsView assignee: 3 CPC subclasses with 75.4% of grants classified under A63F (Card, Board, OR Roulette GAMES; Indoor Games Using Small Moving Playing BODIES; Video GAMES; Games NOT Otherwise Provided FOR). Peak complete grant year is 2020 (11 grants) versus a trough of 2 in 2018. By volume, Ironburg sits between Hitachi Construction Machinery Tierra Co., Ltd. and Kwansei Gakuin Educational Foundation.

Ironburg's three-year grant acceleration

From 2019–2021 to 2022–2024, Ironburg Inventions Limited moved from 24 to 11 grants (0.46x the prior three-year total, a multiple, not a CAGR). See the growth leaderboard.

Hitachi Construct…

57
Innocom Technolog…

57
Ipgate

57
Innovation First

57
Japan Cash Machine

57
Jenavalve Technol…

57
Koganei

57
Kwansei Gakuin Ed…

57
Ironburg Inventio… ◀

57

What this shows Ironburg holds 57 patents at rank #5,948, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Ironburg

By rank, the assignees closest to #5,948 in granted patent volume.

Leaders in A63F (Card)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Ironburg, neither rank-band nor same-CPC leaders (those blocks stay above). In A63F (Card), Ironburg ranks #46 of 894 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (32 here).

Dyaco International Inc. 32 Maquet Cardiopulmonary GmbH 32 Ampio Pharmaceuticals, Inc. 32 American Orthodontics Corporation 32

Similar claim depth

Nearest assignees by average claims per patent (15.0 here).

Martin Professional APS 15.0 avg Axis Lighting Inc. 15.0 avg Staubli Faverges 15.0 avg Institut Mines Telecom 15.0 avg

Ironburg's Innovation Score vs. every tracked assignee

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

32 40th percentile higher than 40% 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

Ironburg Inventions Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	5	8.8%
2016	4	7.0%
2017	8	14.0%
2018	2	3.5%
2019	8	14.0%
2020	11	19.3%
2021	5	8.8%
2022	4	7.0%
2023	5	8.8%
2024	2	3.5%
2025partial year	3	5.3%

Which technologies does Ironburg Inventions Limited patent most?

A63F - Card, Board, OR Roulette GAMES; Indoor Games Using Small Moving Playing BODIES; Video GAMES; Games NOT Otherwise Provided FOR 43

G06F - Electric Digital Data Processing 5

H01H - Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices 2

Top 3 of 3 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

Ironburg Inventions Limited's patent record in context - here's where to go next.

Ironburg Inventions Limited's lead technology class is A63F (Card, Board, OR Roulette GAMES; Indoor Games Using Small Moving Playing BODIES; Video GAMES; Games NOT Otherwise Provided FOR), 75.4% of its portfolio - see every assignee active in that class. Explore A63F
Ranked #5,950 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Ironburg Inventions Limited against Hitachi Construction Machinery Tierra Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 32.2/100 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.