USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Hangzhou Sanhua Research Institute Co., Ltd.

USPTO PatentsView assignee record - 77 granted patents across 48 technology areas, active 2016–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: B60H (ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES).

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

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

14.4

Avg claims per patent

+96%

5-year filing velocity

The verdict

Hangzhou holds 77 US patents across 48 technology areas, rank #4,561 of 50,000 tracked assignees.

#4,561
of 50,000 US assignees by volume: Top 7%
by Innovation Score (55.6/100): 14.4
avg claims per patent: +96%
filing velocity, last 5 yrs

Portfolio overview

Hangzhou Sanhua Research Institute Co., Ltd. has been granted 77 US utility patents between 2016 and 2025, placing Hangzhou Sanhua Research Institute Co., Ltd. at rank #4,561 across all assignees tracked by PlainPatent. This portfolio spans 48 distinct Cooperative Patent Classification (CPC) subclasses, averaging 14.4 claims per patent with primary concentration in B60H (ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES). As a Foreign Corporation, Hangzhou Sanhua Research Institute Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, Hangzhou sits between Emulate, Inc. (77 patents, rank #4,557) and J.s.t. MFG. Co., Ltd. (77 patents, rank #4,565) - the closest US assignees by grant volume. The composite Innovation Score of 55.6/100 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 51 grants, compared with 26 in the 2015–2019 window, a +96% 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. Hangzhou Sanhua Research Institute Co., Ltd.'s 14.4 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while a multi-domain presence across 48 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Hangzhou Sanhua Research Institute Co., Ltd. against peers pursuing similar technology classes.

Emulate

77
GAF Energy

77
GE Oil & Gas Pres…

77
GLO AB

77
Hunan Brunp Recyc…

77
Idorsia Pharmaceu…

77
Isis Innovation

77
J S T MFG

77
Hangzhou Sanhua R… ◀

77

What this shows Hangzhou holds 77 patents at rank #4,561, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Hangzhou

By rank, the assignees closest to #4,561 in granted patent volume.

Leaders in B60H (Arrangements OF Heating)

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

Hangzhou's Innovation Score vs. every tracked assignee

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

56 Top 7% higher than 93% 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

Hangzhou Sanhua Research Institute Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	5	6.5%
2017	7	9.1%
2018	1	1.3%
2019	13	16.9%
2020	2	2.6%
2021	11	14.3%
2022	7	9.1%
2023	9	11.7%
2024	13	16.9%
2025	9	11.7%

Which technologies does Hangzhou Sanhua Research Institute Co., Ltd. patent most?

B60H - ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES 29

F25B - REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS 25

F28F - DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION 24

F28D - HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT 23

Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS 10

F16K - VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING 7

H02K - DYNAMO-ELECTRIC MACHINES 5

Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION 5

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 5

H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 4

H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS 4

G05B - CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS 3

F04D - NON-POSITIVE-DISPLACEMENT PUMPS 3

B23P - METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 3

B60L - PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES ; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES ; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL ; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICL 3

Top 15 of 48 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Multi-domain

Claim Depth Standard

Velocity Accelerating

Where it ranks

Overall rank by patents

#4,561

Across all tracked assignees

Innovation Score

55.6 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 Hangzhou Sanhua Research Institute Co., Ltd. hold?

Hangzhou Sanhua Research Institute Co., Ltd. holds 77 US granted patents filed between 2016 and 2025, spanning 48 technology areas.

What is Hangzhou Sanhua Research Institute Co., Ltd.'s Innovation Score?

Hangzhou Sanhua Research Institute Co., Ltd. has an Innovation Score of 55.6 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Hangzhou Sanhua Research Institute Co., Ltd. focus on?

Hangzhou Sanhua Research Institute Co., Ltd.'s top technology area is B60H (ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES) with 29 patents. The company has filed patents in 48 CPC subclasses total.

Is Hangzhou Sanhua Research Institute Co., Ltd.'s patent filing rate increasing or decreasing?

Hangzhou Sanhua Research Institute Co., Ltd.'s recent filing velocity is +96% compared to the prior five-year period. This indicates accelerating innovation.

What does claim depth mean for Hangzhou Sanhua Research Institute Co., Ltd.'s patents?

Hangzhou Sanhua Research Institute Co., Ltd.'s patents average 14.4 claims each. This falls within the standard range, providing solid legal coverage.

How is the Hangzhou Sanhua Research Institute 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

Hangzhou's 77 grants land it in the top 7% 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 - Hangzhou ranks #4,561 of 50,000. Top 50 holders
Most of this portfolio concentrates in B60H - see who else leads that technology area. B60H 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.

Cite this page

Plainpatent, “Hangzhou Sanhua Research Institute Co., Ltd. Patent Portfolio.” Compiled from the underlying federal/official data source; data as of 2015–2025. https://plainpatent.com/company/hangzhou-sanhua-research-institute-co-ltd/

Formal citation formats (APA / MLA)

APA: Plainpatent. (2015). Hangzhou Sanhua Research Institute Co., Ltd. Patent Portfolio. Retrieved July 27, 2026, from https://plainpatent.com/company/hangzhou-sanhua-research-institute-co-ltd/

MLA: "Hangzhou Sanhua Research Institute Co., Ltd. Patent Portfolio." Plainpatent, 2015, https://plainpatent.com/company/hangzhou-sanhua-research-institute-co-ltd/.

You are welcome to quote these figures with attribution to Plainpatent and the underlying source. The URL above is stable. Licensed CC BY 4.0 - reuse with attribution.

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 by PlainPatent 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.