Where does Door & Window Hardware Co. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Door & Window Hardware Co. ranks #39,878 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 Door & Window Hardware Co. hold?

Door & Window Hardware Co. holds 6 US utility patents granted between 2015 and 2019, spanning 8 technology areas.

What is Door & Window Hardware Co.'s Innovation Score?

Door & Window Hardware Co. has an Innovation Score of 24.1 out of 100 (14th 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 Door & Window Hardware Co. focus on?

Door & Window Hardware Co.'s top technology area is E05B (LOCKS; Accessories THEREFOR; Handcuffs) with 3 patents, ranking #294 of 815 assignees active in that subclass. Grants appear in 8 CPC subclasses total.

Is Door & Window Hardware Co.'s patent grant rate increasing or decreasing?

Door & Window Hardware Co.'s recent grant velocity is -100% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for Door & Window Hardware Co.'s patents?

Door & Window Hardware Co.'s patents average 12.3 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 Door & Window Hardware Co. 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

Door & Window Hardware Co.

USPTO PatentsView assignee record - 6 granted patents across 8 technology areas, recorded in grant years 2015–2019. 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: E05B (LOCKS; Accessories THEREFOR; Handcuffs).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Door ranks #39,878 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 8 technology areas.

#39,878
of 49,997 US assignees by volume: 14th percentile
by Innovation Score (24.1/100): 12.3
avg claims per patent: -100%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R39878 · Foreign Corporation #39,878 · 6 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-RICH · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 6 grants
LOWER-Q #39,878/49,997
PHOTO-FINISH Dongguan Qunan…
CPC-NARROW E05B · 8 areas
INNOV-THIN 24.1/100
CLAIMS-RICH 12.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -100% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Dongguan Qunan Technology Co., Ltd. (±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 Door’s 24.1 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 6.7 pts (28%) Velocity 0.0 pts (0%) Breadth 10.0 pts (41%) Claim depth 7.4 pts (31%)

Qualcomm Incorporated · highest

85
Door & Window Hardware · this assignee

24
3D Lighting… · lowest

7

What this shows Door's Innovation Score is 24.1/100 (14th 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 Door?

Each dot is one of Door’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). Door’s own 12.3 claims/patent is ABOVE the 11.8 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Door's grants concentrate

Door & Window Hardware Co. is a focused PatentsView assignee: 8 CPC subclasses with 50% of grants classified under E05B (LOCKS; Accessories THEREFOR; Handcuffs). Peak complete grant year is 2015 (3 grants) versus a trough of 1 in 2016. By volume, Door sits between Dongguan Qunan Technology Co., Ltd. and Dover Pumps & Process Solutions Segment, Inc..

Dongguan Qunan Te…

6
Dongguan Super El…

6
Dongguan Xingzhan…

6
Dongguan Yuetao P…

6
Doosan Gridtech

6
Double Check Solu…

6
Double Take Arche…

6
Dover Pumps & Pro…

6
Door & Window Har… ◀

6

What this shows Door holds 6 patents at rank #39,896, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Door

By rank, the assignees closest to #39,896 in granted patent volume.

Leaders in E05B (Locks)

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

Door's Innovation Score vs. every tracked assignee

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

24 14th percentile higher than 14% 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 · 2015–2019

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Door & Window Hardware Co. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	3	50.0%
2016	1	16.7%
2019	2	33.3%

Which technologies does Door & Window Hardware Co. patent most?

E05B - LOCKS; Accessories THEREFOR; Handcuffs 3

E05Y - Indexing Scheme Associated With Subclasses E05d AND E05f, Relating TO Construction Elements, Electric Control, Power Supply, Power Signal OR Transmission, User Interfaces, Mounting OR Coupling, Details, Accessories, Auxiliary Operations NOT Otherwise Provided FOR, Application Thereof 2

E05D - Hinges OR Suspension Devices FOR Doors, Windows OR Wings 2

A47F - Special Furniture, Fittings, OR Accessories FOR Shops, Storehouses, Bars, Restaurants OR THE LIKE; Paying Counters 1

F16B - Devices FOR Fastening OR Securing Constructional Elements OR Machine Parts Together, e.g. Nails, Bolts, Circlips, Clamps, Clips OR WEDGES; Joints OR Jointing 1

E05C - Bolts OR Fastening Devices FOR Wings, Specially FOR Doors OR Windows 1

Y10T - Technical Subjects Covered BY Former US Classification 1

E05F - Devices FOR Moving Wings Into Open OR Closed POSITION; Checks FOR WINGS; Wing Fittings NOT Otherwise Provided FOR, Concerned With THE Functioning OF THE Wing 1

Top 8 of 8 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

Door & Window Hardware Co.'s patent record in context - here's where to go next.

Door & Window Hardware Co.'s lead technology class is E05B (LOCKS; Accessories THEREFOR; Handcuffs), 50% of its portfolio - see every assignee active in that class. Explore E05B
Ranked #39,878 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Door & Window Hardware Co. against Dongguan Qunan Technology Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 24.1/100 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.