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

According to USPTO PatentsView (2015–2025 granted utility patents), Stemco Co., Ltd. ranks #13,172 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 Stemco Co., Ltd. hold?

Stemco Co., Ltd. holds 23 US utility patents granted between 2015 and 2025, spanning 14 technology areas.

What is Stemco Co., Ltd.'s Innovation Score?

Stemco Co., Ltd. has an Innovation Score of 46.8 out of 100 (top 20% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

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

Stemco Co., Ltd.'s recent grant velocity is -60% 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 Stemco Co., Ltd.'s patents?

Stemco Co., Ltd.'s patents average 15.5 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 Stemco 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

Stemco Co., Ltd.

Q: What technology areas does Stemco Co., Ltd. focus on?

Stemco 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 14 CPC subclasses total.

USPTO PatentsView assignee record - 23 granted patents across 14 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, Stemco ranks #13,172 of 49,997 tracked US assignees by granted-patent volume, with 23 patents across 14 technology areas.

#13,172
of 49,997 US assignees by volume: Top 20%
by Innovation Score (46.8/100): 15.5
avg claims per patent: -60%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R13172 · Foreign Corporation #13,172 · 23 grants

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

GRANTS-SMALL 23 grants
MID-PACK #13,172/49,997
PHOTO-FINISH Safety Syringes
CPC-FOCUS H05K · 14 areas
INNOV-PAR 46.8/100
CLAIMS-RICH 15.5 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -60% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Safety Syringes, Inc. (±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 Stemco’s 46.8 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 11.0 pts (24%) Velocity 13.3 pts (28%) Breadth 13.2 pts (28%) Claim depth 9.3 pts (20%)

Qualcomm Incorporated · highest

85
Stemco · this assignee

47
3D Lighting… · lowest

7

What this shows Stemco's Innovation Score is 46.8/100 (top 20% 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 Stemco?

Each dot is one of Stemco’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). Stemco’s own 15.5 claims/patent is at or below the 17.1 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Stemco's grants concentrate

Stemco Co., Ltd. is a focused PatentsView assignee: 14 CPC subclasses with 30.4% 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 2016 (6 grants) versus a trough of 1 in 2018. By volume, Stemco sits between Smartsens TECHNOLOGY(HK) Co., Limited and Sartorius BioAnalytical Instruments, Inc..

Stemco's three-year grant acceleration

Stemco Co., Ltd. shows 4 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.

Smartsens Technol…

23
Smw-autoblok Span…

23
Specified

23
State Grid Jiangs…

23
Stmicroelectronic…

23
Strong Force VCN…

23
Safety Syringes

23
Sartorius Bioanal…

23
Stemco ◀

23

What this shows Stemco holds 23 patents at rank #13,149, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Stemco

By rank, the assignees closest to #13,149 in granted patent volume.

Leaders in H05K (Printed Circuits)

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

Stemco's Innovation Score vs. every tracked assignee

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

47 Top 20% higher than 80% 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

Stemco Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	4	17.4%
2016	6	26.1%
2017	4	17.4%
2018	1	4.3%
2021	2	8.7%
2022	1	4.3%
2024	3	13.0%
2025partial year	2	8.7%

Which technologies does Stemco Co., Ltd. patent most?

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

B62D - Motor VEHICLES; Trailers 7

B60C - Vehicle TYRES; Tyre INFLATION; Tyre CHANGING; Connecting Valves TO Inflatable Elastic Bodies IN GENERAL; Devices OR Arrangements Related TO Tyres 5

H01L - Semiconductor Devices NOT Covered BY Class H10 2

F16B - Devices FOR Fastening OR Securing Constructional Elements OR Machine Parts Together, e.g. Nails, Bolts, Circlips, Clamps, Clips OR WEDGES; Joints OR Jointing 2

B60Q - Arrangement OF Signalling OR Lighting Devices, THE Mounting OR Supporting Thereof OR Circuits Therefor, FOR Vehicles IN General 2

B60B - Vehicle Wheels ; CASTORS; Axles FOR Wheels OR CASTORS; Increasing Wheel Adhesion 1

B23B - TURNING; Boring 1

B23Q - Details, Components, OR Accessories FOR Machine Tools, e.g. Arrangements FOR Copying OR Controlling ; Machine Tools IN General Characterised BY THE Construction OF Particular Details OR COMPONENTS; Combinations OR Associations OF Metal-working Machines, NOT Directed TO A Particular Result 1

B23P - Metal-working NOT Otherwise Provided FOR; Combined OPERATIONS; Universal Machine Tools 1

Y10T - Technical Subjects Covered BY Former US Classification 1

Y02T - Climate Change Mitigation Technologies Related TO Transportation 1

G02F - Optical Devices OR Arrangements FOR THE Control OF Light BY Modification OF THE Optical Properties OF THE Media OF THE Elements Involved THEREIN; Non-linear OPTICS; Frequency-changing OF LIGHT; Optical Logic ELEMENTS; Optical ANALOGUE/DIGITAL Converters 1

H01F - MAGNETS; INDUCTANCES; TRANSFORMERS; Selection OF Materials FOR Their Magnetic Properties 1

Top 14 of 14 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

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

Stemco Co., Ltd.'s lead technology class is H05K (Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components), 30.4% of its portfolio - see every assignee active in that class. Explore H05K
Ranked #13,172 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Stemco Co., Ltd. against Smartsens TECHNOLOGY(HK) Co., Limited, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 46.8/100 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.