Where does Nippon Piston Ring Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Nippon Piston Ring Co., Ltd. ranks #8,264 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 Nippon Piston Ring Co., Ltd. hold?

Nippon Piston Ring Co., Ltd. holds 39 US utility patents granted between 2015 and 2024, spanning 28 technology areas.

What is Nippon Piston Ring Co., Ltd.'s Innovation Score?

Nippon Piston Ring Co., Ltd. has an Innovation Score of 40.7 out of 100 (top 35% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Nippon Piston Ring Co., Ltd. focus on?

Nippon Piston Ring Co., Ltd.'s top technology area is F16J (Pistons ; CYLINDERS; Sealings) with 22 patents, ranking #33 of 753 assignees active in that subclass. Grants appear in 28 CPC subclasses total.

Is Nippon Piston Ring Co., Ltd.'s patent grant rate increasing or decreasing?

Nippon Piston Ring Co., Ltd.'s recent grant velocity is -14% 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 Nippon Piston Ring Co., Ltd.'s patents?

Nippon Piston Ring Co., Ltd.'s patents average 10.2 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 Nippon Piston Ring 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

Nippon Piston Ring Co., Ltd.

USPTO PatentsView assignee record - 39 granted patents across 28 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: F16J (Pistons ; CYLINDERS; Sealings).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Nippon ranks #8,264 of 49,997 tracked US assignees by granted-patent volume, with 39 patents across 28 technology areas.

#8,264
of 49,997 US assignees by volume: Top 35%
by Innovation Score (40.7/100): 10.2
avg claims per patent: -14%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R8264 · Foreign Corporation #8,264 · 39 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-SMALL 39 grants
UPPER-Q #8,264/49,997
PHOTO-FINISH NEC Europe
CPC-FOCUS F16J · 28 areas
INNOV-PAR 40.7/100
CLAIMS-PAR 10.2 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -14% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: NEC Europe Ltd. (±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 Nippon’s 40.7 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 12.7 pts (31%) Velocity 3.2 pts (8%) Breadth 18.7 pts (46%) Claim depth 6.1 pts (15%)

Qualcomm Incorporated · highest

85
GDM S P A · near

41
Icomera AB · near

41
Nippon Piston Ring · this assignee

41
Orion Labs · near

41
Pelco · near

41
3D Lighting… · lowest

7

What this shows Nippon's Innovation Score is 40.7/100 (top 35% 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 Nippon?

Each dot is one of Nippon’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). Nippon’s own 10.2 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.

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

Where Nippon's grants concentrate

Nippon Piston Ring Co., Ltd. is a focused PatentsView assignee: 28 CPC subclasses with 56.4% of grants classified under F16J (Pistons ; CYLINDERS; Sealings). Peak complete grant year is 2019 (10 grants) versus a trough of 2 in 2015. By volume, Nippon sits between NEC Europe Ltd. and Nexa3D Inc..

Nippon's three-year grant acceleration

Nippon Piston Ring Co., Ltd. shows 9 grants in 2022–2024 against only 19 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.

NEC Europe

39
Netradyne

39
Neupharma

39
Newpark Mats & In…

39
Nittoh

39
Novadelta—COMÉRCI…

39
Neovasc Tiara

39
Nexa3d

39
Nippon Piston Ring ◀

39

What this shows Nippon holds 39 patents at rank #8,261, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Nippon

By rank, the assignees closest to #8,261 in granted patent volume.

Leaders in F16J (Pistons)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Nippon, neither rank-band nor same-CPC leaders (those blocks stay above). In F16J (Pistons), Nippon ranks #33 of 753 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (41 here).

Pelco, Inc. 41 GDM S.P.A. 41 Orion Labs, Inc. 41 Icomera AB 41

Nippon's Innovation Score vs. every tracked assignee

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

41 Top 35% higher than 65% 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 · 2015–2024

Grants by year

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

View data table

Nippon Piston Ring Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	5.1%
2016	3	7.7%
2017	2	5.1%
2018	4	10.3%
2019	10	25.6%
2020	6	15.4%
2021	3	7.7%
2022	2	5.1%
2023	4	10.3%
2024	3	7.7%

Which technologies does Nippon Piston Ring Co., Ltd. patent most?

F16J - Pistons ; CYLINDERS; Sealings 22

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 14

C22C - Alloys 11

F02F - Cylinders, Pistons OR Casings, FOR Combustion ENGINES; Arrangements OF Sealings IN Combustion Engines 9

B22F - Working Metallic POWDER; Manufacture OF Articles From Metallic POWDER; Making Metallic Powder ; Apparatus OR Devices Specially Adapted FOR Metallic Powder 6

Y10T - Technical Subjects Covered BY Former US Classification 5

F01L - Cyclically Operating Valves FOR Machines OR Engines 5

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 4

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 4

B23P - Metal-working NOT Otherwise Provided FOR; Combined OPERATIONS; Universal Machine Tools 4

A61L - Methods OR Apparatus FOR Sterilising Materials OR Objects IN GENERAL; Disinfection, Sterilisation OR Deodorisation OF AIR; Chemical Aspects OF Bandages, Dressings, Absorbent Pads OR Surgical ARTICLES; Materials FOR Bandages, Dressings, Absorbent Pads OR Surgical Articles 3

C22F - Changing THE Physical Structure OF Non-ferrous Metals AND Non-ferrous Alloys 2

C10M - Lubricating Compositions ; USE OF Chemical Substances Either Alone OR AS Lubricating Ingredients IN A Lubricating Composition 2

C10N - Indexing Scheme Associated With Subclass C10m Relating TO Lubricating Compositions 2

C01P - Indexing Scheme Relating TO Structural AND Physical Aspects OF Solid Inorganic Compounds 2

Top 15 of 28 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

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

Nippon Piston Ring Co., Ltd.'s lead technology class is F16J (Pistons ; CYLINDERS; Sealings), 56.4% of its portfolio - see every assignee active in that class. Explore F16J
Ranked #8,264 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Nippon Piston Ring Co., Ltd. against NEC Europe Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 40.7/100 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.