Where does Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. ranks #39,410 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 Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.'s Innovation Score?

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. has an Innovation Score of 42.7 out of 100 (top 30% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.'s patent grant rate increasing or decreasing?

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.'s recent grant velocity is +100% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.'s patents?

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.'s patents average 9.0 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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.

Q: How many patents does Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. hold?

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. holds 6 US utility patents granted between 2016 and 2024, spanning 9 technology areas.

Q: What technology areas does Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. focus on?

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.'s top technology area is G01C (Measuring Distances, Levels OR BEARINGS; SURVEYING; NAVIGATION; Gyroscopic INSTRUMENTS; Photogrammetry OR Videogrammetry) with 5 patents, ranking #472 of 1,814 assignees active in that subclass. Grants appear in 9 CPC subclasses total.

Q: How is the Changzhou Huada Kejie Opto-Electro Instrument 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 - 6 granted patents across 9 technology areas, recorded in grant years 2016–2024. 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: G01C (Measuring Distances, Levels OR BEARINGS; SURVEYING; NAVIGATION; Gyroscopic INSTRUMENTS; Photogrammetry OR Videogrammetry).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Changzhou ranks #39,410 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 9 technology areas.

#39,410
of 49,997 US assignees by volume: Top 30%
by Innovation Score (42.7/100): 9.0
avg claims per patent: +100%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R39410 · Foreign Corporation #39,410 · 6 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-NARROW · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-MICRO 6 grants
LOWER-Q #39,410/49,997
PHOTO-FINISH Cern
CPC-NARROW G01C · 9 areas
INNOV-PAR 42.7/100
CLAIMS-PAR 9.0 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +100% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Cern Corporation (±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 Changzhou’s 42.7 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 (16%) Velocity 20.0 pts (47%) Breadth 10.6 pts (25%) Claim depth 5.4 pts (13%)

Qualcomm Incorporated · highest

85
Changzhou Huada… · this assignee

43
3D Lighting… · lowest

7

What this shows Changzhou's Innovation Score is 42.7/100 (top 30% 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 Changzhou?

Each dot is one of Changzhou’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). Changzhou’s own 9.0 claims/patent is at or below the 10.3 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Changzhou's grants concentrate

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. is a focused PatentsView assignee: 9 CPC subclasses with 83.3% of grants classified under G01C (Measuring Distances, Levels OR BEARINGS; SURVEYING; NAVIGATION; Gyroscopic INSTRUMENTS; Photogrammetry OR Videogrammetry). Peak complete grant year is 2022 (2 grants) versus a trough of 1 in 2016. By volume, Changzhou sits between Cern Corporation and Chase Corporation.

Changzhou's three-year grant acceleration

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. shows 4 grants in 2022–2024 against only 0 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Cern

6
Certus

6
Changchun Univers…

6
Changjiang River…

6
Charis & Doxa

6
Charles Buist DMD…

6
Charm Alarm

6
Chase

6
Changzhou Huada K… ◀

6

What this shows Changzhou holds 6 patents at rank #39,539, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Changzhou

By rank, the assignees closest to #39,539 in granted patent volume.

Leaders in G01C (Measuring Distances)

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

Changzhou's Innovation Score vs. every tracked assignee

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

43 Top 30% higher than 70% 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 · 2016–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2016–2019 baseline. Full figures in the table below.

View data table

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	1	16.7%
2018	1	16.7%
2022	2	33.3%
2023	1	16.7%
2024	1	16.7%

Which technologies does Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. patent most?

G01C - Measuring Distances, Levels OR BEARINGS; SURVEYING; NAVIGATION; Gyroscopic INSTRUMENTS; Photogrammetry OR Videogrammetry 5

G02B - Optical Elements, Systems OR Apparatus 3

F16H - Gearing 1

G01M - Testing Static OR Dynamic Balance OF Machines OR STRUCTURES; Testing OF Structures OR Apparatus, NOT Otherwise Provided FOR 1

G01B - Measuring Length, Thickness OR Similar Linear DIMENSIONS; Measuring ANGLES; Measuring AREAS; Measuring Irregularities OF Surfaces OR Contours 1

G03B - Apparatus OR Arrangements FOR Taking Photographs OR FOR Projecting OR Viewing THEM; Apparatus OR Arrangements Employing Analogous Techniques Using Waves Other Than Optical WAVES; Accessories Therefor 1

F21Y - Indexing Scheme Associated With Subclasses F21k, F21l, F21s and F21v, Relating TO THE Form OR THE Kind OF THE Light Sources OR OF THE Colour OF THE Light Emitted 1

G01D - Measuring NOT Specially Adapted FOR A Specific VARIABLE; Arrangements FOR Measuring TWO OR More Variables NOT Covered IN A Single Other SUBCLASS; Tariff Metering APPARATUS; Measuring OR Testing NOT Otherwise Provided FOR 1

H01S - Devices Using THE Process OF Light Amplification BY Stimulated Emission OF Radiation [LASER] TO Amplify OR Generate LIGHT; Devices Using Stimulated Emission OF Electromagnetic Radiation IN Wave Ranges Other Than Optical 1

Top 9 of 9 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

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.'s patent record in context - here's where to go next.

Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd.'s lead technology class is G01C (Measuring Distances, Levels OR BEARINGS; SURVEYING; NAVIGATION; Gyroscopic INSTRUMENTS; Photogrammetry OR Videogrammetry), 83.3% of its portfolio - see every assignee active in that class. Explore G01C
Ranked #39,410 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Changzhou Huada Kejie Opto-Electro Instrument Co., Ltd. against Cern Corporation, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 42.7/100 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.