USPTO 2015–2025 USPTO PatentsView Foreign Corporation

KAI R&D Center Co., Ltd.

USPTO PatentsView assignee record - 43 granted patents across 20 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: B26B (HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR).

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

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

5.9

Avg claims per patent

-40%

5-year grant velocity

The verdict

According to USPTO PatentsView, KAI ranks #7,580 of 50,000 tracked US assignees by granted-patent volume, with 43 patents across 20 technology areas.

#7,580
of 50,000 US assignees by volume: Top 42%
by Innovation Score (37.9/100): 5.9
avg claims per patent: -40%
grant velocity, last 5 yrs

Portfolio overview

KAI R&D Center Co., Ltd. has been granted 43 US utility patents between 2015 and 2025, placing KAI R&D Center Co., Ltd. at #7,580 of 50,000 across all assignees tracked by PlainPatent. This portfolio spans 20 distinct Cooperative Patent Classification (CPC) subclasses, averaging 5.9 claims per patent with primary concentration in B26B (HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR). As a Foreign Corporation, KAI R&D Center Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, KAI sits between Inveniam Capital Partners, Inc. (43 patents, rank #7,576) and Leer Group (43 patents, rank #7,584) - the closest US assignees by grant volume. The composite Innovation Score of 37.9/100 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 15 grants, compared with 25 in the 2015–2019 window, a -40% 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. KAI R&D Center Co., Ltd.'s 5.9 average claims per patent is an average count, not a measure of claim scope, legal strength, enforceability, or design-around risk. The record spans 20 CPC subclasses. Combined with portfolio volume, these figures let readers compare the documented grant records of assignees in similar technology classes.

Inveniam Capital…

43
Japan Petroleum E…

43
Jiangsu XCMG Cons…

43
Johnson Matthey D…

43
KARL Leibinger Me…

43
KEY Foundry

43
KITO

43
Leer Group

43
KAI R&D Center ◀

43

What this shows KAI holds 43 patents at rank #7,580, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near KAI

By rank, the assignees closest to #7,580 in granted patent volume.

Leaders in B26B (Hand-held Cutting Tools)

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

KAI's Innovation Score vs. every tracked assignee

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

38 Top 42% higher than 58% 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 · 2015–2025

Grants by year

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

View data table

KAI R&D Center Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	6	14.0%
2016	6	14.0%
2017	3	7.0%
2018	5	11.6%
2019	5	11.6%
2021	6	14.0%
2022	4	9.3%
2023	2	4.7%
2024	3	7.0%
2025partial year	3	7.0%

Which technologies does KAI R&D Center Co., Ltd. patent most?

B26B - HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR 19

A61B - DIAGNOSIS; SURGERY; IDENTIFICATION 4

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 2

F04C - ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS ; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS 2

A61F - FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRS 2

A47G - HOUSEHOLD OR TABLE EQUIPMENT 2

A47J - KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES 2

B26D - CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING 1

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 1

C23F - NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE ; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D 1

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 1

G06Q - INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR 1

F16M - FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS 1

A47L - DOMESTIC WASHING OR CLEANING ; SUCTION CLEANERS IN GENERAL 1

A45D - HAIRDRESSING OR SHAVING EQUIPMENT ; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING 1

Top 15 of 20 technology areas

Grant record at a glance

Portfolio Volume 43 grants

CPC subclasses 20

Avg. claims / grant 5.9

Velocity -40%

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

Where it ranks

Overall rank by patents

#7,580

of 50,000 tracked assignees

Innovation Score

37.9 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 KAI R&D Center Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), KAI R&D Center Co., Ltd. ranks #7,580 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 KAI R&D Center Co., Ltd. hold?

KAI R&D Center Co., Ltd. holds 43 US utility patents granted between 2015 and 2025, spanning 20 technology areas.

What is KAI R&D Center Co., Ltd.'s Innovation Score?

KAI R&D Center Co., Ltd. has an Innovation Score of 37.9 out of 100 (top 42% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does KAI R&D Center Co., Ltd. focus on?

KAI R&D Center Co., Ltd.'s top technology area is B26B (HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR) with 19 patents. Grants appear in 20 CPC subclasses total.

Is KAI R&D Center Co., Ltd.'s patent grant rate increasing or decreasing?

KAI R&D Center Co., Ltd.'s recent grant velocity is -40% 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 KAI R&D Center Co., Ltd.'s patents?

KAI R&D Center Co., Ltd.'s patents average 5.9 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 KAI R&D Center 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.

How to use this portfolio

KAI's 43 grants land it in the top 42% 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 - KAI ranks #7,580 of 50,000. Top 50 holders
Most of this portfolio concentrates in B26B - see who else leads that technology area. B26B 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.