Where does HHC Changzhou Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), HHC Changzhou Corporation ranks #35,694 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 HHC Changzhou Corporation hold?

HHC Changzhou Corporation holds 7 US utility patents granted 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 (7th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant 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, ranking #128 of 728 assignees active in that subclass. Grants appear in 3 CPC subclasses total.

Is HHC Changzhou Corporation's patent grant rate increasing or decreasing?

HHC Changzhou Corporation's recent grant velocity is +150% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for HHC Changzhou Corporation's patents?

HHC Changzhou Corporation's patents average 9.9 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 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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

HHC Changzhou Corporation

USPTO PatentsView assignee record - 7 granted patents across 3 technology areas, recorded in grant years 2019–2022. 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: A47C (CHAIRS; SOFAS; Beds).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, HHC ranks #35,694 of 49,997 tracked US assignees by granted-patent volume, with 7 patents across 3 technology areas.

#35,694
of 49,997 US assignees by volume: 7th percentile
by Innovation Score (20.3/100): 9.9
avg claims per patent: +150%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R35694 · Foreign Corporation #35,694 · 7 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-PAR · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-MICRO 7 grants
MID-PACK #35,694/49,997
PHOTO-FINISH Hermes Testing…
CPC-NARROW A47C · 3 areas
INNOV-THIN 20.3/100
CLAIMS-PAR 9.9 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +150% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Hermes Testing Solutions Inc. (±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 HHC’s 20.3 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 7.2 pts (35%) Velocity 1.1 pts (5%) Breadth 6.1 pts (30%) Claim depth 5.9 pts (29%)

Qualcomm Incorporated · highest

85
HHC Changzhou · this assignee

20
3D Lighting… · lowest

7

What this shows HHC's Innovation Score is 20.3/100 (7th percentile 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 HHC?

Each dot is one of HHC’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). HHC’s own 9.9 claims/patent is at or below the 11.0 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where HHC's grants concentrate

HHC Changzhou Corporation is a focused PatentsView assignee: 3 CPC subclasses with 100% of grants classified under A47C (CHAIRS; SOFAS; Beds). Peak complete grant year is 2020 (3 grants) versus a trough of 1 in 2021. By volume, HHC sits between Hermes Testing Solutions Inc. and High Voltage Graphics, Inc..

HHC's three-year grant acceleration

HHC Changzhou Corporation shows 1 grants in 2022–2024 against only 6 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.

Hermes Testing So…

7
Hexagon Manufactu…

7
Hexcel Composites…

7
Hexcel Reinforcem…

7
HIB Trim Part Sol…

7
Hiconics Eco-ener…

7
Hiconics Eco-ener…

7
High Voltage Grap…

7
HHC Changzhou ◀

7

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.

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, grant velocity, technology breadth, and claim depth (0–100)

20 7th percentile higher than 7% 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 · 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?

A47C - CHAIRS; SOFAS; Beds 7

A61G - Transport, Personal Conveyances, OR Accommodation Specially Adapted FOR Patients OR Disabled Persons ; Operating Tables OR CHAIRS; Chairs FOR DENTISTRY; Funeral Devices 2

B60N - Seats Specially Adapted FOR VEHICLES; Vehicle Passenger Accommodation NOT Otherwise Provided FOR 1

Top 3 of 3 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

HHC Changzhou Corporation's patent record in context - here's where to go next.

HHC Changzhou Corporation's lead technology class is A47C (CHAIRS; SOFAS; Beds), 100% of its portfolio - see every assignee active in that class. Explore A47C
Ranked #35,694 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare HHC Changzhou Corporation against Hermes Testing Solutions Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 20.3/100 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.