PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

HHC Changzhou Corporation

USPTO PatentsView assignee record - 7 granted patents across 3 technology areas, active 2019–2022. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: A47C (CHAIRS; SOFAS; BEDS).

Explore the portfolio See the ranking
7
Total patents granted
3
CPC technology areas
9.9
Avg claims per patent
+150%
5-year filing velocity

The verdict

HHC holds 7 US patents across 3 technology areas, rank #35,639 of 50,000 tracked assignees.

#35,639
of 50,000 US assignees by volume
Top 93%
by Innovation Score (20.3/100)
9.9
avg claims per patent
+150%
filing velocity, last 5 yrs

Portfolio overview

HHC Changzhou Corporation has been granted 7 US utility patents between 2019 and 2022, placing HHC Changzhou Corporation at rank #35,639 across all assignees tracked by PlainPatent. This portfolio spans 3 distinct Cooperative Patent Classification (CPC) subclasses, averaging 9.9 claims per patent with primary concentration in A47C (CHAIRS; SOFAS; BEDS). As a Foreign Corporation, HHC Changzhou Corporation is one of the more focused assignees in the PatentsView dataset. By volume, HHC sits between Hermes Testing Solutions Inc. (7 patents, rank #35,635) and HIGH Voltage Graphics, Inc. (7 patents, rank #35,643) - the closest US assignees by grant volume. The composite Innovation Score of 20.3/100 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 2 in the 2015–2019 window, a +150% 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. HHC Changzhou Corporation's 9.9 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while specialization in 3 subclasses reflects a tightly scoped invention area. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark HHC Changzhou Corporation against peers pursuing similar technology classes.

Who files at HHC's volume?

Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀

patents

What this shows HHC holds 7 patents at rank #35,639, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Source USPTO PatentsView, granted utility patents As of 2015–2025

Companies ranked near HHC

By rank, the assignees closest to #35,639 in granted patent volume.

Leaders in A47C (Chairs)

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

HHC's Innovation Score vs. every tracked assignee

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

20 Top 93% higher than 7% of 50,000 US assignees

0–10: 687 US assignees (1%). Below this entry. 10–20: 2,527 US assignees (5%). Below this entry. 20–30: 13,162 US assignees (26%). This entry sits in this band. 30–40: 15,294 US assignees (31%). Above this entry. 40–50: 11,491 US assignees (23%). Above this entry. 50–60: 5,058 US assignees (10%). Above this entry. 60–70: 1,537 US assignees (3%). Above this entry. 70–80: 234 US assignees (0%). Above this entry. 80–90: 10 US assignees (0%). Above this entry. 90–100: 0 US assignees (0%). Above this entry. This assignee 0 100 every tracked assignee, bucketed by value

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

0.511.522.533.5 2019202020212022 1
USPTO utility patent grants by year · 2019–2022

Grants by year

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

View data table
HHC Changzhou Corporation patent grants by year, 2015–2025
Year Patents Granted Share of Period
2019 2 28.6%
2020 3 42.9%
2021 1 14.3%
2022 1 14.3%

Which technologies does HHC Changzhou Corporation patent most?

Top 3 of 3 technology areas

Patent Moat Analysis

Portfolio Volume Light
Tech Breadth Specialized
Claim Depth Simple
Velocity Accelerating

Where it ranks

Overall rank by patents

#35,639

Across all tracked assignees

Innovation Score

20.3 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 HHC Changzhou Corporation hold?
HHC Changzhou Corporation holds 7 US granted patents filed between 2019 and 2022, spanning 3 technology areas.
What is HHC Changzhou Corporation's Innovation Score?
HHC Changzhou Corporation has an Innovation Score of 20.3 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does HHC Changzhou Corporation focus on?
HHC Changzhou Corporation's top technology area is A47C (CHAIRS; SOFAS; BEDS) with 7 patents. The company has filed patents in 3 CPC subclasses total.
Is HHC Changzhou Corporation's patent filing rate increasing or decreasing?
HHC Changzhou Corporation's recent filing velocity is +150% compared to the prior five-year period. This indicates accelerating innovation.
What does claim depth mean for HHC Changzhou Corporation's patents?
HHC Changzhou Corporation's patents average 9.9 claims each. This is relatively simple claim structure, typical for focused inventions.
How is the HHC Changzhou Corporation 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

HHC's 7 grants land it in the top 93% 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 - HHC ranks #35,639 of 50,000. Top 50 holders
  • Most of this portfolio concentrates in A47C - see who else leads that technology area. A47C 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

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.