USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Sango Co., Ltd.

USPTO PatentsView assignee record - 28 granted patents across 31 technology areas, active 2016–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: F01N (GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-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

8.6

Avg claims per patent

-44%

5-year filing velocity

The verdict

Sango holds 28 US patents across 31 technology areas, rank #11,060 of 50,000 tracked assignees.

#11,060
of 50,000 US assignees by volume: Top 42%
by Innovation Score (38.0/100): 8.6
avg claims per patent: -44%
filing velocity, last 5 yrs

Portfolio overview

Sango Co., Ltd. has been granted 28 US utility patents between 2016 and 2025, placing Sango Co., Ltd. at rank #11,060 across all assignees tracked by PlainPatent. This portfolio spans 31 distinct Cooperative Patent Classification (CPC) subclasses, averaging 8.6 claims per patent with primary concentration in F01N (GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES). As a Foreign Corporation, Sango Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, Sango sits between Rock River Arms, Inc. (28 patents, rank #11,056) and Shenzhen Institute OF Terahertz Technology AND Innovation (28 patents, rank #11,064) - the closest US assignees by grant volume. The composite Innovation Score of 38.0/100 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 10 grants, compared with 18 in the 2015–2019 window, a -44% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. 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. Sango Co., Ltd.'s 8.6 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 31 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Sango Co., Ltd. against peers pursuing similar technology classes.

Rock River Arms

28
Rock-tenn Shared…

28
Roka Sports

28
Rosetta Genomics

28
Sapproro Medical…

28
Schroeder Industr…

28
Shakespeare

28
Shenzhen Institut…

28
Sango ◀

28

What this shows Sango holds 28 patents at rank #11,060, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Sango

By rank, the assignees closest to #11,060 in granted patent volume.

Leaders in F01N (Gas-flow Silencers OR Exhaust Apparatus FOR Machines OR E…)

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

Sango's Innovation Score vs. every tracked assignee

Composite of portfolio volume, filing 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 · 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

Sango Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	10	35.7%
2017	5	17.9%
2018	1	3.6%
2019	2	7.1%
2020	5	17.9%
2021	2	7.1%
2022	1	3.6%
2024	1	3.6%
2025	1	3.6%

Which technologies does Sango Co., Ltd. patent most?

F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES 8

B21D - WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL 6

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 4

F23D - BURNERS 4

H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 3

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 3

F23L - SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS ; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES 3

F16L - PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL 2

F23Q - IGNITION ; EXTINGUISHING-DEVICES 2

F01P - COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES 2

Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION 2

C01B - NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C 1

B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES 1

B60K - ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY 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

Top 15 of 31 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#11,060

Across all tracked assignees

Innovation Score

38.0 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 Sango Co., Ltd. hold?

Sango Co., Ltd. holds 28 US granted patents filed between 2016 and 2025, spanning 31 technology areas.

What is Sango Co., Ltd.'s Innovation Score?

Sango Co., Ltd. has an Innovation Score of 38.0 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Sango Co., Ltd. focus on?

Sango Co., Ltd.'s top technology area is F01N (GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES) with 8 patents. The company has filed patents in 31 CPC subclasses total.

Is Sango Co., Ltd.'s patent filing rate increasing or decreasing?

Sango Co., Ltd.'s recent filing velocity is -44% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

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

Sango Co., Ltd.'s patents average 8.6 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Sango 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

Sango's 28 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 - Sango ranks #11,060 of 50,000. Top 50 holders
Most of this portfolio concentrates in F01N - see who else leads that technology area. F01N 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.