Where does Changjiang Survey Planning Design AND Research Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Changjiang Survey Planning Design AND Research Co., Ltd. ranks #45,597 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

What is Changjiang Survey Planning Design AND Research Co., Ltd.'s Innovation Score?

Changjiang Survey Planning Design AND Research Co., Ltd. has an Innovation Score of 23.2 out of 100 (12th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Changjiang Survey Planning Design AND Research Co., Ltd.'s patent grant rate increasing or decreasing?

Changjiang Survey Planning Design AND Research Co., Ltd.'s recent grant velocity is -75% 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 Changjiang Survey Planning Design AND Research Co., Ltd.'s patents?

Changjiang Survey Planning Design AND Research Co., Ltd.'s patents average 10.6 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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Changjiang Survey Planning Design AND Research Co., Ltd.

Q: How many patents does Changjiang Survey Planning Design AND Research Co., Ltd. hold?

Changjiang Survey Planning Design AND Research Co., Ltd. holds 5 US utility patents granted between 2018 and 2020, spanning 9 technology areas.

Q: What technology areas does Changjiang Survey Planning Design AND Research Co., Ltd. focus on?

Changjiang Survey Planning Design AND Research Co., Ltd.'s top technology area is G21C (Nuclear Reactors) with 5 patents. Grants appear in 9 CPC subclasses total.

Q: How is the Changjiang Survey Planning Design AND Research Co., 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.

USPTO PatentsView assignee record - 5 granted patents across 9 technology areas, recorded in grant years 2018–2020. 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: G21C (Nuclear Reactors).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Changjiang ranks #45,597 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 9 technology areas.

#45,597
of 49,997 US assignees by volume: 12th percentile
by Innovation Score (23.2/100): 10.6
avg claims per patent: -75%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R45597 · Foreign Corporation #45,597 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-PAR · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 5 grants
BOTTOM-DECILE #45,597/49,997
PHOTO-FINISH Champtek Incorporated
CPC-NARROW G21C · 9 areas
INNOV-THIN 23.2/100
CLAIMS-PAR 10.6 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -75% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Champtek Incorporated (±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.

Qualcomm Incorporated · highest

85
Changjiang Survey… · this assignee

23
3D Lighting… · lowest

7

What this shows Changjiang's Innovation Score is 23.2/100 (12th 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.

Where Changjiang's grants concentrate

Changjiang Survey Planning Design AND Research Co., Ltd. is a focused PatentsView assignee: 9 CPC subclasses with 100% of grants classified under G21C (Nuclear Reactors). Peak complete grant year is 2019 (3 grants) versus a trough of 1 in 2018. By volume, Changjiang sits between Champtek Incorporated and Charabot.

Champtek Incorpor…

5
Chandlertec

5
Chang YOW Interna…

5
Changing Internat…

5
Changzheng Engine…

5
Changzhou Kaisen…

5
Chaperone Therape…

5
Charabot

5
Changjiang Survey… ◀

5

What this shows Changjiang holds 5 patents at rank #45,503, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Changjiang

By rank, the assignees closest to #45,503 in granted patent volume.

Leaders in G21C (Nuclear Reactors)

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

Changjiang's Innovation Score vs. every tracked assignee

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

23 12th percentile higher than 12% 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 · 2018–2020

Grants by year

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

View data table

Changjiang Survey Planning Design AND Research Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	1	20.0%
2019	3	60.0%
2020	1	20.0%

Which technologies does Changjiang Survey Planning Design AND Research Co., Ltd. patent most?

G21C - Nuclear Reactors 5

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 4

E02D - FOUNDATIONS; EXCAVATIONS; Embankments ; Underground OR Underwater Structures 3

G21D - Nuclear Power Plant 3

E21D - SHAFTS; TUNNELS; GALLERIES; Large Underground Chambers 3

B66C - CRANES; Load-engaging Elements OR Devices FOR Cranes, Capstans, Winches, OR Tackles 1

E04G - SCAFFOLDING; FORMS; SHUTTERING; Building Implements OR Aids, OR Their USE; Handling Building Materials ON THE SITE; Repairing, Breaking-up OR Other Work ON Existing Buildings 1

E04H - Buildings OR Like Structures FOR Particular PURPOSES; Swimming OR Splash Baths OR POOLS; MASTS; FENCING; Tents OR Canopies, IN General 1

G21F - Protection Against X-radiation, Gamma Radiation, Corpuscular Radiation OR Particle BOMBARDMENT; Treating Radioactively Contaminated MATERIAL; Decontamination Arrangements Therefor 1

Top 9 of 9 technology areas

Where it ranks

Overall rank by patents

#45,597

of 49,997 tracked assignees

Innovation Score

23.2 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

What to do with this data

Changjiang Survey Planning Design AND Research Co., Ltd.'s patent record in context - here's where to go next.

Changjiang Survey Planning Design AND Research Co., Ltd.'s lead technology class is G21C (Nuclear Reactors), 100% of its portfolio - see every assignee active in that class. Explore G21C
Ranked #45,597 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Changjiang Survey Planning Design AND Research Co., Ltd. against Champtek Incorporated, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 23.2/100 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.