Where does SL Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), SL Corporation ranks #1,849 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 SL Corporation hold?

SL Corporation holds 218 US utility patents granted between 2015 and 2025, spanning 46 technology areas.

What is SL Corporation's Innovation Score?

SL Corporation has an Innovation Score of 59.6 out of 100 (top 4% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is SL Corporation's patent grant rate increasing or decreasing?

SL Corporation's recent grant velocity is +76% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for SL Corporation's patents?

SL Corporation's patents average 14.5 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 SL 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 2015–2025 USPTO PatentsView Foreign Corporation

SL Corporation

Q: What technology areas does SL Corporation focus on?

SL Corporation's top technology area is F21S (Non-portable Lighting DEVICES; Systems THEREOF; Vehicle Lighting Devices Specially Adapted FOR Vehicle Exteriors) with 119 patents, ranking #17 of 1,094 assignees active in that subclass. Grants appear in 46 CPC subclasses total.

USPTO PatentsView assignee record - 218 granted patents across 46 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: F21S (Non-portable Lighting DEVICES; Systems THEREOF; Vehicle Lighting Devices Specially Adapted FOR Vehicle Exteriors).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, SL ranks #1,849 of 49,997 tracked US assignees by granted-patent volume, with 218 patents across 46 technology areas.

#1,849
of 49,997 US assignees by volume: Top 4%
by Innovation Score (59.6/100): 14.5
avg claims per patent: +76%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R1849 · Foreign Corporation #1,849 · 218 grants

GRANTS-MID · TOP-DECILE · PHOTO-FINISH · CPC-WIDE · INNOV-PAR · CLAIMS-RICH · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-MID 218 grants
TOP-DECILE #1,849/49,997
PHOTO-FINISH Carl Zeiss Vision…
CPC-WIDE F21S · 46 areas
INNOV-PAR 59.6/100
CLAIMS-RICH 14.5 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +76% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Carl Zeiss Vision International GmbH (±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 SL’s 59.6 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 18.6 pts (31%) Velocity 8.2 pts (14%) Breadth 24.0 pts (40%) Claim depth 8.7 pts (15%)

Qualcomm Incorporated · highest

85
Daimler Truck · near

60
Kaneka · near

60
SL · this assignee

60
The Goodyear Tire &… · near

60
Valmet Oy · near

60
3D Lighting… · lowest

7

What this shows SL's Innovation Score is 59.6/100 (top 4% 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 SL?

Each dot is one of SL’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). SL’s own 14.5 claims/patent is at or below the 17.2 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where SL's grants concentrate

SL Corporation is a focused PatentsView assignee: 46 CPC subclasses with 54.6% of grants classified under F21S (Non-portable Lighting DEVICES; Systems THEREOF; Vehicle Lighting Devices Specially Adapted FOR Vehicle Exteriors). Peak complete grant year is 2023 (30 grants) versus a trough of 8 in 2015. By volume, SL sits between Carl Zeiss Vision International GmbH and Unisys Corporation.

SL's three-year grant acceleration

From 2019–2021 to 2022–2024, SL Corporation moved from 68 to 84 grants (1.24x the prior three-year total, a multiple, not a CAGR). Among 3,296 tracked assignees with ≥100 grants and ≥20 prior-period grants, that multiple ranks #730. See the growth leaderboard.

Carl Zeiss Vision…

218
Furukawa Automoti…

218
National Chung Sh…

218
NIO USA

218
Steelseries Aps

218
Suncast

218
Total Marketing S…

218
Unisys

218
SL ◀

218

What this shows SL holds 218 patents at rank #1,849, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near SL

By rank, the assignees closest to #1,849 in granted patent volume.

Leaders in F21S (Non-portable Lighting Devices)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for SL, neither rank-band nor same-CPC leaders (those blocks stay above). In F21S (Non-portable Lighting Devices), SL ranks #17 of 1,094 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (60 here).

Kaneka Corporation 60 The Goodyear Tire & Rubber Company 60 Valmet Technologies Oy 60 Daimler Truck AG 60

Similar claim depth

Nearest assignees by average claims per patent (14.5 here).

HL Mando Corporation 14.5 avg Hongfujin Precision ELECTRONICS(TIANJIN)CO., Ltd. 14.5 avg Continental Automotive Systems Inc. 14.5 avg Radiant Opto-Electronics Corporation 14.5 avg

SL's Innovation Score vs. every tracked assignee

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

60 Top 4% higher than 96% 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

SL Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	8	3.7%
2016	24	11.0%
2017	13	6.0%
2018	13	6.0%
2019	18	8.3%
2020	22	10.1%
2021	28	12.8%
2022	25	11.5%
2023	30	13.8%
2024	29	13.3%
2025partial year	8	3.7%

Which technologies does SL Corporation patent most?

F21S - Non-portable Lighting DEVICES; Systems THEREOF; Vehicle Lighting Devices Specially Adapted FOR Vehicle Exteriors 119

B60Q - Arrangement OF Signalling OR Lighting Devices, THE Mounting OR Supporting Thereof OR Circuits Therefor, FOR Vehicles IN General 82

F16H - Gearing 65

F21W - Indexing Scheme Associated With Subclasses F21k, F21l, F21s and F21v, Relating TO Uses OR Applications OF Lighting Devices OR Systems 58

F21V - Functional Features OR Details OF Lighting Devices OR Systems THEREOF; Structural Combinations OF Lighting Devices With Other Articles, NOT Otherwise Provided FOR 32

G02B - Optical Elements, Systems OR Apparatus 23

B60K - Arrangement OR Mounting OF Propulsion Units OR OF Transmissions IN VEHICLES; Arrangement OR Mounting OF Plural Diverse Prime-movers IN VEHICLES; Auxiliary Drives FOR VEHICLES; Instrumentation OR Dashboards FOR VEHICLES; Arrangements IN Connection With Cooling, AIR Intake, GAS Exhaust OR Fuel Supply 22

Y10T - Technical Subjects Covered BY Former US Classification 19

F21Y - Indexing Scheme Associated With Subclasses F21k, F21l, F21s and F21v, Relating TO THE Form OR THE Kind OF THE Light Sources OR OF THE Colour OF THE Light Emitted 18

G05G - Control Devices OR Systems Insofar AS Characterised BY Mechanical Features Only 16

B60R - Vehicles, Vehicle Fittings, OR Vehicle Parts, NOT Otherwise Provided FOR 11

B62D - Motor VEHICLES; Trailers 6

H05B - Electric HEATING; Electric Light Sources NOT Otherwise Provided FOR; Circuit Arrangements FOR Electric Light Sources, IN General 5

H02K - Dynamo-electric Machines 5

G01D - Measuring NOT Specially Adapted FOR A Specific VARIABLE; Arrangements FOR Measuring TWO OR More Variables NOT Covered IN A Single Other SUBCLASS; Tariff Metering APPARATUS; Measuring OR Testing NOT Otherwise Provided FOR 5

Top 15 of 46 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

SL Corporation's patent record in context - here's where to go next.

SL Corporation's lead technology class is F21S (Non-portable Lighting DEVICES; Systems THEREOF; Vehicle Lighting Devices Specially Adapted FOR Vehicle Exteriors), 54.6% of its portfolio - see every assignee active in that class. Explore F21S
Ranked #1,849 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare SL Corporation against Carl Zeiss Vision International GmbH, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 59.6/100 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.