USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Solar Frontier K.k.

USPTO PatentsView assignee record - 27 granted patents across 16 technology areas, recorded in grant years 2015–2024. 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: Y02E (REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION).

Compiled by PlainPatent, US Patent Intelligence Editorial Process · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

9.0

Avg claims per patent

-58%

5-year grant velocity

The verdict

According to USPTO PatentsView, Solar ranks #11,444 of 50,000 tracked US assignees by granted-patent volume, with 27 patents across 16 technology areas.

#11,444
of 50,000 US assignees by volume: Top 62%
by Innovation Score (31.6/100): 9.0
avg claims per patent: -58%
grant velocity, last 5 yrs

Portfolio overview

Solar Frontier K.k. has been granted 27 US utility patents between 2015 and 2024, placing Solar Frontier K.k. at #11,444 of 50,000 across all assignees tracked by PlainPatent. This portfolio spans 16 distinct Cooperative Patent Classification (CPC) subclasses, averaging 9.0 claims per patent with primary concentration in Y02E (REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION). As a Foreign Corporation, Solar Frontier K.k. is one of the more focused assignees in the PatentsView dataset. By volume, Solar sits between Sinyu Technology (fujian) Co., Ltd. (27 patents, rank #11,424) and Stichting Energieonderzoek Centrum Nederland (27 patents, rank #11,432) - the closest US assignees by grant volume. The composite Innovation Score of 31.6/100 blends portfolio volume, grant velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Grant cadence records the difference between two grant-year windows. Between 2020 and 2024 the company received 8 grants, compared with 19 in the 2015–2019 window, a -58% shift in five-year grant velocity. Both windows cover five complete grant years; the latest PatentsView year is a partial release and is excluded from this comparison, though it still appears in the yearly table and chart below. Grant timing can lag the related application by years, so this comparison does not establish current R&D spending, strategic intent, or a company’s application activity. The Foreign Corporation classification provides context for the assignee record, not a conclusion about its business strategy.

Claim depth and technology breadth describe this aggregate record. Solar Frontier K.k.'s 9.0 average claims per patent is an average count, not a measure of claim scope, legal strength, enforceability, or design-around risk. The record spans 16 CPC subclasses. Combined with portfolio volume, these figures let readers compare the documented grant records of assignees in similar technology classes.

Sinyu Technology…

27
Sofec

27
Softwear Automati…

27
Solantro Semicond…

27
Solmetex

27
Source Global PBC

27
STAT Medical Devi…

27
Stichting Energie…

27
Solar Frontier K K ◀

27

What this shows Solar holds 27 patents at rank #11,428, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Solar

By rank, the assignees closest to #11,428 in granted patent volume.

Leaders in Y02E (Reduction OF Greenhouse GAS [GHG] Emissions)

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

Solar's Innovation Score vs. every tracked assignee

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

32 Top 62% higher than 38% of 50,000 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 · 2015–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Solar Frontier K.k. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	3	11.1%
2016	5	18.5%
2017	5	18.5%
2018	2	7.4%
2019	4	14.8%
2020	3	11.1%
2021	4	14.8%
2024	1	3.7%

Which technologies does Solar Frontier K.k. patent most?

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 25

H10F - INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION 19

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 11

H02S - GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES 9

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 6

F24S - SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS 6

Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS 6

C22C - ALLOYS 4

B22F - WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER ; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER 4

H10D - INORGANIC ELECTRIC SEMICONDUCTOR DEVICES 3

H10H - INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS 3

B09B - DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR 1

Y02W - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT 1

B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 1

B29B - PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS 1

Top 15 of 16 technology areas

Grant record at a glance

Portfolio Volume 27 grants

CPC subclasses 16

Avg. claims / grant 9.0

Velocity -58%

Historical grant data only; it does not rate legal strength or current strategy.

Where it ranks

Overall rank by patents

#11,444

of 50,000 tracked assignees

Innovation Score

31.6 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

Where does Solar Frontier K.k. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Solar Frontier K.k. ranks #11,444 of 50,000 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Solar Frontier K.k. hold?

Solar Frontier K.k. holds 27 US utility patents granted between 2015 and 2024, spanning 16 technology areas.

What is Solar Frontier K.k.'s Innovation Score?

Solar Frontier K.k. has an Innovation Score of 31.6 out of 100 (top 62% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Solar Frontier K.k. focus on?

Solar Frontier K.k.'s top technology area is Y02E (REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION) with 25 patents. Grants appear in 16 CPC subclasses total.

Is Solar Frontier K.k.'s patent grant rate increasing or decreasing?

Solar Frontier K.k.'s recent grant velocity is -58% 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 Solar Frontier K.k.'s patents?

Solar Frontier K.k.'s patents average 9.0 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 Solar Frontier K.k. 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.

How to use this portfolio

Solar's 27 grants land it in the top 62% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - Solar ranks #11,444 of 50,000. Top 50 holders
Most of this portfolio concentrates in Y02E - see who else leads that technology area. Y02E leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

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.