PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

China National Digital Switching System Engineering & Technological R&D Center

USPTO PatentsView assignee record - 6 granted patents across 2 technology areas, active 2018–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H04L (TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION).

Explore the portfolio See the ranking
6
Total patents granted
2
CPC technology areas
14.2
Avg claims per patent
+400%
5-year filing velocity

The verdict

China holds 6 US patents across 2 technology areas, rank #39,367 of 50,000 tracked assignees.

#39,367
of 50,000 US assignees by volume
Top 93%
by Innovation Score (20.2/100)
14.2
avg claims per patent
+400%
filing velocity, last 5 yrs

Portfolio overview

China National Digital Switching System Engineering & Technological R&D Center has been granted 6 US utility patents between 2018 and 2025, placing China National Digital Switching System Engineering & Technological R&D Center at rank #39,367 across all assignees tracked by PlainPatent. This portfolio spans 2 distinct Cooperative Patent Classification (CPC) subclasses, averaging 14.2 claims per patent with primary concentration in H04L (TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION). As a Foreign Corporation, China National Digital Switching System Engineering & Technological R&D Center is one of the more focused assignees in the PatentsView dataset. By volume, China sits between Chengdu BOE Display Sci-tech Co., Ltd. (6 patents, rank #39,363) and China Tobacco Hubei Industrial Corporation Limited (6 patents, rank #39,371) - the closest US assignees by grant volume. The composite Innovation Score of 20.2/100 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 1 in the 2015–2019 window, a +400% 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. China National Digital Switching System Engineering & Technological R&D Center's 14.2 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while specialization in 2 subclasses reflects a tightly scoped invention area. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark China National Digital Switching System Engineering & Technological R&D Center against peers pursuing similar technology classes.

Who files at China's volume?

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

patents

What this shows China holds 6 patents at rank #39,367, 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 China

By rank, the assignees closest to #39,367 in granted patent volume.

Leaders in H04L (Transmission OF Digital Information)

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

China'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 201820212025 3
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
China National Digital Switching System Engineering & Technological R&D Center patent grants by year, 2015–2025
Year Patents Granted Share of Period
2018 1 16.7%
2021 2 33.3%
2025 3 50.0%

Which technologies does China National Digital Switching System Engineering & Technological R&D Center patent most?

Top 2 of 2 technology areas

Patent Moat Analysis

Portfolio Volume Light
Tech Breadth Specialized
Claim Depth Standard
Velocity Accelerating

Where it ranks

Overall rank by patents

#39,367

Across all tracked assignees

Innovation Score

20.2 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 China National Digital Switching System Engineering & Technological R&D Center hold?
China National Digital Switching System Engineering & Technological R&D Center holds 6 US granted patents filed between 2018 and 2025, spanning 2 technology areas.
What is China National Digital Switching System Engineering & Technological R&D Center's Innovation Score?
China National Digital Switching System Engineering & Technological R&D Center has an Innovation Score of 20.2 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does China National Digital Switching System Engineering & Technological R&D Center focus on?
China National Digital Switching System Engineering & Technological R&D Center's top technology area is H04L (TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION) with 6 patents. The company has filed patents in 2 CPC subclasses total.
Is China National Digital Switching System Engineering & Technological R&D Center's patent filing rate increasing or decreasing?
China National Digital Switching System Engineering & Technological R&D Center's recent filing velocity is +400% compared to the prior five-year period. This indicates accelerating innovation.
What does claim depth mean for China National Digital Switching System Engineering & Technological R&D Center's patents?
China National Digital Switching System Engineering & Technological R&D Center's patents average 14.2 claims each. This falls within the standard range, providing solid legal coverage.
How is the China National Digital Switching System Engineering & Technological R&D Center 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

China's 6 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 - China ranks #39,367 of 50,000. Top 50 holders
  • Most of this portfolio concentrates in H04L - see who else leads that technology area. H04L 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.