USPTO 2015–2025 USPTO PatentsView Foreign Corporation

DONG YANG Piston Co., Ltd.

USPTO PatentsView assignee record - 8 granted patents across 12 technology areas, active 2016–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: F02F (CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

10.5

Avg claims per patent

+67%

5-year filing velocity

The verdict

DONG holds 8 US patents across 12 technology areas, rank #31,401 of 50,000 tracked assignees.

#31,401
of 50,000 US assignees by volume: Top 81%
by Innovation Score (26.1/100): 10.5
avg claims per patent: +67%
filing velocity, last 5 yrs

Portfolio overview

DONG YANG Piston Co., Ltd. has been granted 8 US utility patents between 2016 and 2025, placing DONG YANG Piston Co., Ltd. at rank #31,401 across all assignees tracked by PlainPatent. This portfolio spans 12 distinct Cooperative Patent Classification (CPC) subclasses, averaging 10.5 claims per patent with primary concentration in F02F (CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES). As a Foreign Corporation, DONG YANG Piston Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, DONG sits between DNA Script SAS (8 patents, rank #31,397) and DOW Brasil Sudeste Industrial LTDA. (8 patents, rank #31,405) - the closest US assignees by grant volume. The composite Innovation Score of 26.1/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 5 grants, compared with 3 in the 2015–2019 window, a +67% shift in five-year velocity. An acceleration of this magnitude signals aggressive R&D investment and expanding technical ambition. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. DONG YANG Piston Co., Ltd.'s 10.5 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 12 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark DONG YANG Piston Co., Ltd. against peers pursuing similar technology classes.

DNA Script SAS

8
DNT Scientific Re…

8
Dolphin Fluidics…

8
Dominion Engineer…

8
Dongguan Hongyu P…

8
Dongguan Lianrun…

8
Douxmatok

8
DOW Brasil Sudest…

8
DONG YANG Piston ◀

8

What this shows DONG holds 8 patents at rank #31,401, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near DONG

By rank, the assignees closest to #31,401 in granted patent volume.

Leaders in F02F (Cylinders)

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

DONG's Innovation Score vs. every tracked assignee

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

26 Top 81% higher than 19% 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 · 2016–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2016–2019 baseline. Full figures in the table below.

View data table

DONG YANG Piston Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	1	12.5%
2018	2	25.0%
2020	3	37.5%
2021	1	12.5%
2025	1	12.5%

Which technologies does DONG YANG Piston Co., Ltd. patent most?

F02F - CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES 6

B22C - FOUNDRY MOULDING 3

F01P - COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES 3

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 2

F16J - PISTONS ; CYLINDERS; SEALINGS 2

H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 1

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 1

B23P - METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 1

B22D - CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 1

B29L - INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES 1

B29C - SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 1

H05K - PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 1

Top 12 of 12 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Simple

Velocity Accelerating

Where it ranks

Overall rank by patents

#31,401

Across all tracked assignees

Innovation Score

26.1 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does DONG YANG Piston Co., Ltd. hold?

DONG YANG Piston Co., Ltd. holds 8 US granted patents filed between 2016 and 2025, spanning 12 technology areas.

What is DONG YANG Piston Co., Ltd.'s Innovation Score?

DONG YANG Piston Co., Ltd. has an Innovation Score of 26.1 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does DONG YANG Piston Co., Ltd. focus on?

DONG YANG Piston Co., Ltd.'s top technology area is F02F (CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES) with 6 patents. The company has filed patents in 12 CPC subclasses total.

Is DONG YANG Piston Co., Ltd.'s patent filing rate increasing or decreasing?

DONG YANG Piston Co., Ltd.'s recent filing velocity is +67% compared to the prior five-year period. This indicates accelerating innovation.

What does claim depth mean for DONG YANG Piston Co., Ltd.'s patents?

DONG YANG Piston Co., Ltd.'s patents average 10.5 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the DONG YANG Piston 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

DONG's 8 grants land it in the top 81% 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 - DONG ranks #31,401 of 50,000. Top 50 holders
Most of this portfolio concentrates in F02F - see who else leads that technology area. F02F 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 Editorial

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 byPlainPatent Editorial, US Patent Intelligence Editorial Team · 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.