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

According to USPTO PatentsView (2015–2025 granted utility patents), Keihin Ramtech Co., Ltd. ranks #48,087 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 Keihin Ramtech Co., Ltd. hold?

Keihin Ramtech Co., Ltd. holds 5 US utility patents granted between 2020 and 2022, spanning 4 technology areas.

What is Keihin Ramtech Co., Ltd.'s Innovation Score?

Keihin Ramtech Co., Ltd. has an Innovation Score of 17.9 out of 100 (5th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

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

Insufficient historical data is available to calculate a velocity trend for Keihin Ramtech Co., Ltd..

What does claim depth mean for Keihin Ramtech Co., Ltd.'s patents?

Keihin Ramtech Co., Ltd.'s patents average 5.0 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 Keihin Ramtech 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

Keihin Ramtech Co., Ltd.

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

Keihin Ramtech Co., Ltd.'s top technology area is 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) with 5 patents, ranking #449 of 1,658 assignees active in that subclass. Grants appear in 4 CPC subclasses total.

USPTO PatentsView assignee record - 5 granted patents across 4 technology areas, recorded in grant years 2020–2022. 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: 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 Evap).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Keihin ranks #48,087 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 4 technology areas.

#48,087
of 49,997 US assignees by volume: 5th percentile
by Innovation Score (17.9/100): 5.0
avg claims per patent

USPTO PatentsView assignee plate

Corpus R48087 · Foreign Corporation #48,087 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-LOW · CLAIMS-SPARSE · TYPE-FRNCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 5 grants
BOTTOM-DECILE #48,087/49,997
PHOTO-FINISH Kedlin
CPC-NARROW C23C · 4 areas
INNOV-LOW 17.9/100
CLAIMS-SPARSE 5.0 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2020–2022 · 3y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Kedlin Company LLC (±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 Keihin’s 17.9 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 6.2 pts (34%) Velocity 1.7 pts (9%) Breadth 7.1 pts (39%) Claim depth 3.0 pts (17%)

Qualcomm Incorporated · highest

85
Keihin Ramtech · this assignee

18
3D Lighting… · lowest

7

What this shows Keihin's Innovation Score is 17.9/100 (5th 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 Keihin?

Each dot is one of Keihin’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). Keihin’s own 5.0 claims/patent is at or below the 12.6 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Keihin's grants concentrate

Keihin Ramtech Co., Ltd. is a focused PatentsView assignee: 4 CPC subclasses with 100% of grants classified under 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 Evap). Peak complete grant year is 2020 (2 grants) versus a trough of 1 in 2022. By volume, Keihin sits between Kedlin Company LLC and Kellogg North America Company.

Keihin's three-year grant acceleration

Keihin Ramtech Co., Ltd. shows 1 grants in 2022–2024 against only 4 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.

Kedlin

5
Keewin Display

5
Keezio Group

5
Kegel

5
Keirton

5
Keiryo Packaging

5
Kejr

5
Kellogg North Ame…

5
Keihin Ramtech ◀

5

What this shows Keihin holds 5 patents at rank #48,191, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Keihin

By rank, the assignees closest to #48,191 in granted patent volume.

Leaders in C23C (Coating Metallic Material)

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

Keihin's Innovation Score vs. every tracked assignee

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

18 5th percentile higher than 5% 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 · 2020–2022

Grants by year

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

View data table

Keihin Ramtech Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	2	40.0%
2021	2	40.0%
2022	1	20.0%

Which technologies does Keihin Ramtech Co., Ltd. patent most?

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 5

H01J - Electric Discharge Tubes OR Discharge Lamps 5

H05H - Plasma Technique ; Production OF Accelerated Electrically-charged Particles OR OF NEUTRONS; Production OR Acceleration OF Neutral Molecular OR Atomic Beams 1

F28F - Details OF Heat-exchange AND Heat-transfer Apparatus, OF General Application 1

Top 4 of 4 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

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

Keihin Ramtech Co., Ltd.'s lead technology class is 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 Evap), 100% of its portfolio - see every assignee active in that class. Explore C23C
Ranked #48,087 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Keihin Ramtech Co., Ltd. against Kedlin Company LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 17.9/100 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.