Where does Daido Steel Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Daido Steel Co., Ltd. ranks #3,802 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 Daido Steel Co., Ltd. hold?

Daido Steel Co., Ltd. holds 95 US utility patents granted between 2015 and 2025, spanning 41 technology areas.

What is Daido Steel Co., Ltd.'s Innovation Score?

Daido Steel Co., Ltd. has an Innovation Score of 49.5 out of 100 (top 15% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Daido Steel Co., Ltd. focus on?

Daido Steel Co., Ltd.'s top technology area is C22C (Alloys) with 64 patents. Grants appear in 41 CPC subclasses total.

Is Daido Steel Co., Ltd.'s patent grant rate increasing or decreasing?

Daido Steel Co., Ltd.'s recent grant velocity is +4% 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 Daido Steel Co., Ltd.'s patents?

Daido Steel Co., Ltd.'s patents average 10.7 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 Daido Steel Co., Ltd. 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

Daido Steel Co., Ltd.

USPTO PatentsView assignee record - 95 granted patents across 41 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: C22C (Alloys).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Daido ranks #3,802 of 49,997 tracked US assignees by granted-patent volume, with 95 patents across 41 technology areas.

#3,802
of 49,997 US assignees by volume: Top 15%
by Innovation Score (49.5/100): 10.7
avg claims per patent: +4%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R3802 · Foreign Corporation #3,802 · 95 grants

GRANTS-SMALL · TOP-DECILE · PHOTO-FINISH · CPC-WIDE · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-FLAT · BOOK-FULL

GRANTS-SMALL 95 grants
TOP-DECILE #3,802/49,997
PHOTO-FINISH Beijing Roborock…
CPC-WIDE C22C · 41 areas
INNOV-PAR 49.5/100
CLAIMS-PAR 10.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-FLAT +4% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Beijing Roborock Technology 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.

Qualcomm Incorporated · highest

85
Corcept Therapeutics… · near

50
Daido Steel · this assignee

50
Hyosung Heavy… · near

50
National University… · near

50
Zhejiang Sunny Optical · near

50
3D Lighting… · lowest

7

What this shows Daido's Innovation Score is 49.5/100 (top 15% 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 Daido's grants concentrate

Daido Steel Co., Ltd. is a focused PatentsView assignee: 41 CPC subclasses with 67.4% of grants classified under C22C (Alloys). Peak complete grant year is 2019 (16 grants) versus a trough of 6 in 2015. By volume, Daido sits between Beijing Roborock Technology Co., Ltd. and Ferag AG.

Daido's three-year grant acceleration

From 2019–2021 to 2022–2024, Daido Steel Co., Ltd. moved from 37 to 26 grants (0.70x the prior three-year total, a multiple, not a CAGR). See the growth leaderboard.

Beijing Roborock…

95
Cabot Microelectr…

95
Comcast Cable Com…

95
Cortica

95
Daqri

95
Dialog Semiconduc…

95
Element Six

95
Ferag

95
Daido Steel ◀

95

What this shows Daido holds 95 patents at rank #3,802, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Daido

By rank, the assignees closest to #3,802 in granted patent volume.

Leaders in C22C (Alloys)

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

Assignees with similar portfolio profiles

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

Similar innovation score

Nearest assignees by Innovation Score (50 here).

Hyosung Heavy Industries Corporation 50 Corcept Therapeutics Incorporated 50 Zhejiang Sunny Optical Co., Ltd 50 National University Corporation Ehime University 50

Similar claim depth

Nearest assignees by average claims per patent (10.7 here).

Fameccanica.Data S.p.A. 10.7 avg Digitalglobe Inc 10.7 avg KT&G Corporation 10.7 avg Showa Denko K.K. 10.7 avg

Daido's Innovation Score vs. every tracked assignee

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

50 Top 15% higher than 85% 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

Daido Steel Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	6	6.3%
2016	8	8.4%
2017	9	9.5%
2018	6	6.3%
2019	16	16.8%
2020	14	14.7%
2021	7	7.4%
2022	12	12.6%
2023	6	6.3%
2024	8	8.4%
2025partial year	3	3.2%

Which technologies does Daido Steel Co., Ltd. patent most?

C22C - Alloys 64

C21D - Modifying THE Physical Structure OF Ferrous METALS; General Devices FOR Heat Treatment OF Ferrous OR Non-ferrous Metals OR ALLOYS; Making Metal Malleable, e.g. BY Decarburisation OR Tempering 34

H01F - MAGNETS; INDUCTANCES; TRANSFORMERS; Selection OF Materials FOR Their Magnetic Properties 19

B22F - Working Metallic POWDER; Manufacture OF Articles From Metallic POWDER; Making Metallic Powder ; Apparatus OR Devices Specially Adapted FOR Metallic Powder 18

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 14

C23C - Coating Metallic MATERIAL; Coating Material With Metallic MATERIAL; Surface Treatment OF Metallic Material BY Diffusion Into THE Surface, BY Chemical Conversion OR SUBSTITUTION; Coating BY Vacuum Evaporation, BY Sputtering, BY ION Implantation OR BY Chemical Vapour Deposition, IN General 11

B33Y - Additive Manufacturing, i.e. Manufacturing OF Three-dimensional [3-D] Objects BY Additive Deposition, Additive Agglomeration OR Additive Layering, e.g. BY 3-D Printing, Stereolithography OR Selective Laser Sintering 10

C22F - Changing THE Physical Structure OF Non-ferrous Metals AND Non-ferrous Alloys 7

B21J - FORGING; HAMMERING; Pressing METAL; RIVETING; Forge Furnaces 7

B22D - Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices 6

B29C - Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing 5

F27B - Furnaces, Kilns, Ovens OR Retorts IN GENERAL; Open Sintering OR Like Apparatus 5

F16C - SHAFTS; Flexible SHAFTS; Elements OR Crankshaft MECHANISMS; Rotary Bodies Other Than Gearing ELEMENTS; Bearings 4

B30B - Presses IN General 4

B22C - Foundry Moulding 4

Top 15 of 41 technology areas

Where it ranks

Overall rank by patents

#3,802

of 49,997 tracked assignees

Innovation Score

49.5 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

What to do with this data

Daido Steel Co., Ltd.'s patent record in context - here's where to go next.

Daido Steel Co., Ltd.'s lead technology class is C22C (Alloys), 67.4% of its portfolio - see every assignee active in that class. Explore C22C
Ranked #3,802 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Daido Steel Co., Ltd. against Beijing Roborock Technology Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 49.5/100 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.