USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Dongguan Shichang Metals Factory Ltd.

USPTO PatentsView assignee record - 40 granted patents across 15 technology areas, recorded in grant years 2018–2025. 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: A47B (TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE).

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

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

6.6

Avg claims per patent

+1033%

5-year grant velocity

The verdict

According to USPTO PatentsView, Dongguan ranks #8,011 of 50,000 tracked US assignees by granted-patent volume, with 40 patents across 15 technology areas.

#8,011
of 50,000 US assignees by volume: Top 56%
by Innovation Score (33.3/100): 6.6
avg claims per patent: +1033%
grant velocity, last 5 yrs

Portfolio overview

Dongguan Shichang Metals Factory Ltd. has been granted 40 US utility patents between 2018 and 2025, placing Dongguan Shichang Metals Factory Ltd. at #8,011 of 50,000 across all assignees tracked by PlainPatent. This portfolio spans 15 distinct Cooperative Patent Classification (CPC) subclasses, averaging 6.6 claims per patent with primary concentration in A47B (TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE). As a Foreign Corporation, Dongguan Shichang Metals Factory Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, Dongguan sits between DOYO Engineering Co., Ltd. (40 patents, rank #8,009) and Endoevolution, Llc (40 patents, rank #8,017) - the closest US assignees by grant volume. The composite Innovation Score of 33.3/100 blends portfolio volume, grant velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Grant cadence records the difference between two grant-year windows. Between 2020 and 2024 the company received 34 grants, compared with 3 in the 2015–2019 window, a +1033% shift in five-year grant velocity. Both windows cover five complete grant years; the latest PatentsView year is a partial release and is excluded from this comparison, though it still appears in the yearly table and chart below. Grant timing can lag the related application by years, so this comparison does not establish current R&D spending, strategic intent, or a company’s application activity. The Foreign Corporation classification provides context for the assignee record, not a conclusion about its business strategy.

Claim depth and technology breadth describe this aggregate record. Dongguan Shichang Metals Factory Ltd.'s 6.6 average claims per patent is an average count, not a measure of claim scope, legal strength, enforceability, or design-around risk. The record spans 15 CPC subclasses. Combined with portfolio volume, these figures let readers compare the documented grant records of assignees in similar technology classes.

DOYO Engineering

40
DSG Technology Ho…

40
Defond Electech

40
Dialogic

40
E &J Gallo Winery

40
Echostar Internat…

40
Elucid Bioimaging

40
Endoevolution

40
Dongguan Shichang… ◀

40

What this shows Dongguan holds 40 patents at rank #8,013, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Dongguan

By rank, the assignees closest to #8,013 in granted patent volume.

Leaders in A47B (Tables)

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

Dongguan's Innovation Score vs. every tracked assignee

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

33 Top 56% higher than 44% 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 · 2018–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2018–2019 baseline. Full figures in the table below.

View data table

Dongguan Shichang Metals Factory Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	3	7.5%
2020	9	22.5%
2021	15	37.5%
2022	4	10.0%
2023	5	12.5%
2024	1	2.5%
2025partial year	3	7.5%

Which technologies does Dongguan Shichang Metals Factory Ltd. patent most?

A47B - TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE 12

A47C - CHAIRS; SOFAS; BEDS 8

B29L - INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES 6

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 6

E04C - STRUCTURAL ELEMENTS; BUILDING MATERIALS 4

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 4

A47F - SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS 4

B62B - HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES 4

B65D - CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES 3

D10B - INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES 2

D03D - WOVEN FABRICS; METHODS OF WEAVING; LOOMS 2

D06P - DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM 1

D06N - WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR 1

B65G - TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS 1

A61G - TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS ; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES 1

Top 15 of 15 technology areas

Grant record at a glance

Portfolio Volume 40 grants

CPC subclasses 15

Avg. claims / grant 6.6

Velocity +1033%

Historical grant data only; it does not rate legal strength or current strategy.

Where it ranks

Overall rank by patents

#8,011

of 50,000 tracked assignees

Innovation Score

33.3 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

Where does Dongguan Shichang Metals Factory Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Dongguan Shichang Metals Factory Ltd. ranks #8,011 of 50,000 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Dongguan Shichang Metals Factory Ltd. hold?

Dongguan Shichang Metals Factory Ltd. holds 40 US utility patents granted between 2018 and 2025, spanning 15 technology areas.

What is Dongguan Shichang Metals Factory Ltd.'s Innovation Score?

Dongguan Shichang Metals Factory Ltd. has an Innovation Score of 33.3 out of 100 (top 56% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Dongguan Shichang Metals Factory Ltd. focus on?

Dongguan Shichang Metals Factory Ltd.'s top technology area is A47B (TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE) with 12 patents. Grants appear in 15 CPC subclasses total.

Is Dongguan Shichang Metals Factory Ltd.'s patent grant rate increasing or decreasing?

Dongguan Shichang Metals Factory Ltd.'s recent grant velocity is +1033% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Dongguan Shichang Metals Factory Ltd.'s patents?

Dongguan Shichang Metals Factory Ltd.'s patents average 6.6 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 Dongguan Shichang Metals Factory 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

Dongguan's 40 grants land it in the top 56% 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 - Dongguan ranks #8,011 of 50,000. Top 50 holders
Most of this portfolio concentrates in A47B - see who else leads that technology area. A47B 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

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.