Where does Duraflex Hong Kong Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Duraflex Hong Kong Limited ranks #4,004 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 Duraflex Hong Kong Limited hold?

Duraflex Hong Kong Limited holds 90 US utility patents granted between 2016 and 2025, spanning 22 technology areas.

What is Duraflex Hong Kong Limited's Innovation Score?

Duraflex Hong Kong Limited has an Innovation Score of 39.5 out of 100 (top 38% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Duraflex Hong Kong Limited focus on?

Duraflex Hong Kong Limited's top technology area is A44B (Buttons, Pins, Buckles, Slide Fasteners, OR THE Like) with 40 patents, ranking #2 of 276 assignees active in that subclass. Grants appear in 22 CPC subclasses total.

Is Duraflex Hong Kong Limited's patent grant rate increasing or decreasing?

Duraflex Hong Kong Limited's recent grant velocity is +90% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Duraflex Hong Kong Limited's patents?

Duraflex Hong Kong Limited's patents average 6.0 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 Duraflex Hong Kong Limited 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

Duraflex Hong Kong Limited

USPTO PatentsView assignee record - 90 granted patents across 22 technology areas, recorded in grant years 2016–2025. 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: A44B (Buttons, Pins, Buckles, Slide Fasteners, OR THE Like).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Duraflex ranks #4,004 of 49,997 tracked US assignees by granted-patent volume, with 90 patents across 22 technology areas.

#4,004
of 49,997 US assignees by volume: Top 38%
by Innovation Score (39.5/100): 6.0
avg claims per patent: +90%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R4004 · Foreign Corporation #4,004 · 90 grants

GRANTS-SMALL · TOP-DECILE · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-SMALL 90 grants
TOP-DECILE #4,004/49,997
PHOTO-FINISH Camco Manufacturing
CPC-FOCUS A44B · 22 areas
INNOV-THIN 39.5/100
CLAIMS-SPARSE 6.0 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +90% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Camco Manufacturing, LLC (±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 Duraflex’s 39.5 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 15.6 pts (39%) Velocity 3.7 pts (9%) Breadth 16.6 pts (42%) Claim depth 3.6 pts (9%)

Qualcomm Incorporated · highest

85
BGC Partners · near

39
Duraflex Hong Kong · this assignee

39
HP Printing Korea · near

39
Ibis Biosciences · near

39
Landscape Structures · near

39
3D Lighting… · lowest

7

What this shows Duraflex's Innovation Score is 39.5/100 (top 38% 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 Duraflex?

Each dot is one of Duraflex’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). Duraflex’s own 6.0 claims/patent is at or below the 12.7 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Duraflex's grants concentrate

Duraflex Hong Kong Limited is a focused PatentsView assignee: 22 CPC subclasses with 44.4% of grants classified under A44B (Buttons, Pins, Buckles, Slide Fasteners, OR THE Like). Peak complete grant year is 2020 (17 grants) versus a trough of 3 in 2017. By volume, Duraflex sits between Cnpc USA Corporation and Hodogaya Chemical Co., Ltd..

Duraflex's three-year grant acceleration

From 2019–2021 to 2022–2024, Duraflex Hong Kong Limited moved from 41 to 23 grants (0.56x the prior three-year total, a multiple, not a CAGR). See the growth leaderboard.

Cnpc USA

90
Camco Manufacturi…

90
Compass Therapeut…

90
Dicastal North Am…

90
Ecole Superieure…

90
Egis Technology

90
Federal-mogul Mot…

90
Hodogaya Chemical

90
Duraflex Hong Kong ◀

90

What this shows Duraflex holds 90 patents at rank #4,004, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Duraflex

By rank, the assignees closest to #4,004 in granted patent volume.

Leaders in A44B (Buttons)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Duraflex, neither rank-band nor same-CPC leaders (those blocks stay above). In A44B (Buttons), Duraflex ranks #2 of 276 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (39 here).

BGC Partners, Inc. 39 HP Printing Korea Co., Ltd. 39 Ibis Biosciences, Inc. 39 Landscape Structures Inc. 39

Similar claim depth

Nearest assignees by average claims per patent (6.0 here).

Cybex GmbH 6.0 avg Nippon Soda Co., Ltd. 6.0 avg 100% Speedlab, LLC 6.0 avg De' Longhi Appliances S.R.L. CON Unico Socio 6.0 avg

Duraflex's Innovation Score vs. every tracked assignee

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

39 Top 38% higher than 62% 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 · 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

Duraflex Hong Kong Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	9	10.0%
2017	3	3.3%
2018	8	8.9%
2019	9	10.0%
2020	17	18.9%
2021	15	16.7%
2022	7	7.8%
2023	8	8.9%
2024	8	8.9%
2025partial year	6	6.7%

Which technologies does Duraflex Hong Kong Limited patent most?

A44B - Buttons, Pins, Buckles, Slide Fasteners, OR THE Like 40

A44D - Indexing Scheme Relating TO Buttons, Pins, Buckles OR Slide Fasteners, AND TO Jewellery, Bracelets OR Other Personal Adornments 12

Y10T - Technical Subjects Covered BY Former US Classification 10

F16G - Belts, Cables, OR Ropes, Predominantly Used FOR Driving PURPOSES; CHAINS; Fittings Predominantly Used Therefor 10

A41D - OUTERWEAR; Protective GARMENTS; Accessories 4

A45C - PURSES; LUGGAGE; Hand Carried Bags 3

A45F - Travelling OR Camp EQUIPMENT: Sacks OR Packs Carried ON THE Body 3

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 3

B29L - Indexing Scheme Associated With Subclass B29c, Relating TO Particular Articles 3

A41F - Garment FASTENINGS; Suspenders 3

G10K - Sound-producing DEVICES; Methods OR Devices FOR Protecting Against, OR FOR Damping, Noise OR Other Acoustic Waves IN GENERAL; Acoustics NOT Otherwise Provided FOR 2

F16B - Devices FOR Fastening OR Securing Constructional Elements OR Machine Parts Together, e.g. Nails, Bolts, Circlips, Clamps, Clips OR WEDGES; Joints OR Jointing 2

H01R - Electrically-conductive CONNECTIONS; Structural Associations OF A Plurality OF Mutually-insulated Electrical Connecting ELEMENTS; Coupling DEVICES; Current Collectors 1

B29D - Producing Particular Articles From Plastics OR From Substances IN A Plastic State 1

B23P - Metal-working NOT Otherwise Provided FOR; Combined OPERATIONS; Universal Machine Tools 1

Top 15 of 22 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

Duraflex Hong Kong Limited's patent record in context - here's where to go next.

Duraflex Hong Kong Limited's lead technology class is A44B (Buttons, Pins, Buckles, Slide Fasteners, OR THE Like), 44.4% of its portfolio - see every assignee active in that class. Explore A44B
Ranked #4,004 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Duraflex Hong Kong Limited against Cnpc USA Corporation, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 39.5/100 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.