Where does San-ei Kagaku Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), San-ei Kagaku Co., Ltd. ranks #37,326 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 San-ei Kagaku Co., Ltd. hold?

San-ei Kagaku Co., Ltd. holds 7 US utility patents granted between 2015 and 2025, spanning 10 technology areas.

What is San-ei Kagaku Co., Ltd.'s Innovation Score?

San-ei Kagaku Co., Ltd. has an Innovation Score of 24.5 out of 100 (15th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is San-ei Kagaku Co., Ltd.'s patent grant rate increasing or decreasing?

San-ei Kagaku Co., Ltd.'s recent grant velocity is -80% 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 San-ei Kagaku Co., Ltd.'s patents?

San-ei Kagaku Co., Ltd.'s patents average 10.3 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.

How is the San-ei Kagaku 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

San-ei Kagaku Co., Ltd.

Q: What technology areas does San-ei Kagaku Co., Ltd. focus on?

San-ei Kagaku Co., Ltd.'s top technology area is H05K (Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components) with 7 patents, ranking #772 of 3,545 assignees active in that subclass. Grants appear in 10 CPC subclasses total.

USPTO PatentsView assignee record - 7 granted patents across 10 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: H05K (Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, San-ei ranks #37,326 of 49,997 tracked US assignees by granted-patent volume, with 7 patents across 10 technology areas.

#37,326
of 49,997 US assignees by volume: 15th percentile
by Innovation Score (24.5/100): 10.3
avg claims per patent: -80%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R37326 · Foreign Corporation #37,326 · 7 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-PAR · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 7 grants
MID-PACK #37,326/49,997
PHOTO-FINISH Samsung SDI LD
CPC-FOCUS H05K · 10 areas
INNOV-THIN 24.5/100
CLAIMS-PAR 10.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -80% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Samsung SDI Co., LD. (±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 San-ei’s 24.5 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 7.2 pts (29%) Velocity 0.0 pts (0%) Breadth 11.2 pts (46%) Claim depth 6.2 pts (25%)

Qualcomm Incorporated · highest

85
San-ei Kagaku · this assignee

25
3D Lighting… · lowest

7

What this shows San-ei's Innovation Score is 24.5/100 (15th 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 San-ei?

Each dot is one of San-ei’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). San-ei’s own 10.3 claims/patent is at or below the 10.4 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where San-ei's grants concentrate

San-ei Kagaku Co., Ltd. is a focused PatentsView assignee: 10 CPC subclasses with 100% of grants classified under H05K (Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components). Peak complete grant year is 2015 (2 grants) versus a trough of 1 in 2016. By volume, San-ei sits between Samsung SDI Co., LD. and Sanoculis Ltd.

Samsung SDI LD

7
Samsung SDS Ameri…

7
Samsung Total Pet…

7
Samwon ACT

7
Sandel Avionics

7
Sandora Household…

7
Sani-tech West

7
Sanoculis

7
San-ei Kagaku ◀

7

What this shows San-ei holds 7 patents at rank #37,294, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near San-ei

By rank, the assignees closest to #37,294 in granted patent volume.

Leaders in H05K (Printed Circuits)

Other assignees with the most granted patents in San-ei's primary technology class.

San-ei's Innovation Score vs. every tracked assignee

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

25 15th percentile higher than 15% 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

San-ei Kagaku Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	28.6%
2016	1	14.3%
2017	2	28.6%
2020	1	14.3%
2025partial year	1	14.3%

Which technologies does San-ei Kagaku Co., Ltd. patent most?

H05K - Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components 7

H01L - Semiconductor Devices NOT Covered BY Class H10 5

C08G - Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds 3

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 3

B23K - Soldering OR UNSOLDERING; WELDING; Cladding OR Plating BY Soldering OR WELDING; Cutting BY Applying Heat Locally, e.g. Flame CUTTING; Working BY Laser Beam 2

C08L - Compositions OF Macromolecular Compounds 2

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 1

Y10T - Technical Subjects Covered BY Former US Classification 1

G03F - Photomechanical Production OF Textured OR Patterned Surfaces, e.g. FOR Printing, FOR Processing OF Semiconductor DEVICES; Materials THEREFOR; Originals THEREFOR; Apparatus Specially Adapted THEREFOR; 1

C08F - Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds 1

Top 10 of 10 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

San-ei Kagaku Co., Ltd.'s patent record in context - here's where to go next.

San-ei Kagaku Co., Ltd.'s lead technology class is H05K (Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components), 100% of its portfolio - see every assignee active in that class. Explore H05K
Ranked #37,326 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare San-ei Kagaku Co., Ltd. against Samsung SDI Co., LD., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 24.5/100 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.