Where does Changzhou Kaisen Photoelectricity Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Changzhou Kaisen Photoelectricity Co., Ltd. ranks #45,599 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 Changzhou Kaisen Photoelectricity Co., Ltd. hold?

Changzhou Kaisen Photoelectricity Co., Ltd. holds 5 US utility patents granted between 2020 and 2022, spanning 5 technology areas.

What is Changzhou Kaisen Photoelectricity Co., Ltd.'s Innovation Score?

Changzhou Kaisen Photoelectricity Co., Ltd. has an Innovation Score of 22.3 out of 100 (10th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Changzhou Kaisen Photoelectricity Co., Ltd.'s patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Changzhou Kaisen Photoelectricity Co., Ltd..

What does claim depth mean for Changzhou Kaisen Photoelectricity Co., Ltd.'s patents?

Changzhou Kaisen Photoelectricity Co., Ltd.'s patents average 6.2 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 Kaisen Photoelectricity Co., Ltd.

Q: What technology areas does Changzhou Kaisen Photoelectricity Co., Ltd. focus on?

Changzhou Kaisen Photoelectricity Co., Ltd.'s top technology area is F21K (Non-electric Light Sources Using LUMINESCENCE; Light Sources Using ELECTROCHEMILUMINESCENCE; Light Sources Using Charges OF Combustible MATERIAL; Light Sources Using Semiconductor Devices AS Light-generating ELEMENTS; Light Sources NOT Otherwise Provided FOR) with 2 patents, ranking #268 of 564 assignees active in that subclass. Grants appear in 5 CPC subclasses total.

Q: How is the Changzhou Kaisen Photoelectricity 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 5 technology areas, recorded in grant years 2020–2022. 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: F21K (Non-electric Light Sources Using LUMINESCENCE; Light Sources Using ELECTROCHEMILUMINESCENCE; Light Sources Using Charges OF Combustible MATERIAL; Light Sources Using Semiconductor Devices AS Light-gen).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Changzhou ranks #45,599 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 5 technology areas.

#45,599
of 49,997 US assignees by volume: 10th percentile
by Innovation Score (22.3/100): 6.2
avg claims per patent

USPTO PatentsView assignee plate

Corpus R45599 · Foreign Corporation #45,599 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 5 grants
BOTTOM-DECILE #45,599/49,997
PHOTO-FINISH Chang YOW Internatio…
CPC-NARROW F21K · 5 areas
INNOV-THIN 22.3/100
CLAIMS-SPARSE 6.2 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2020–2022 · 3y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Chang YOW Technologies International 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 Changzhou’s 22.3 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 6.2 pts (28%) Velocity 4.4 pts (20%) Breadth 7.9 pts (36%) Claim depth 3.7 pts (17%)

Qualcomm Incorporated · highest

85
Changzhou Kaisen… · this assignee

22
3D Lighting… · lowest

7

What this shows Changzhou's Innovation Score is 22.3/100 (10th 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 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 6.2 claims/patent is at or below the 8.6 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 Kaisen Photoelectricity Co., Ltd. is a focused PatentsView assignee: 5 CPC subclasses with 40% of grants classified under F21K (Non-electric Light Sources Using LUMINESCENCE; Light Sources Using ELECTROCHEMILUMINESCENCE; Light Sources Using Charges OF Combustible MATERIAL; Light Sources Using Semiconductor Devices AS Light-gen). Peak complete grant year is 2020 (2 grants) versus a trough of 1 in 2021. By volume, Changzhou sits between Chang YOW Technologies International Co., Ltd. and Charles Viancin Group.

Changzhou's three-year grant acceleration

Changzhou Kaisen Photoelectricity Co., Ltd. shows 2 grants in 2022–2024 against only 3 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.

Chang YOW Interna…

5
Changing Internat…

5
Changjiang Survey…

5
Changzheng Engine…

5
Chaperone Therape…

5
Charabot

5
Charles Austen Pu…

5
Charles Viancin G…

5
Changzhou Kaisen… ◀

5

What this shows Changzhou holds 5 patents at rank #45,505, 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 #45,505 in granted patent volume.

Leaders in F21K (Non-electric Light Sources Using Luminescence)

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)

22 10th percentile higher than 10% 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 · 2020–2022

Grants by year

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

View data table

Changzhou Kaisen Photoelectricity Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	2	40.0%
2021	1	20.0%
2022	2	40.0%

Which technologies does Changzhou Kaisen Photoelectricity Co., Ltd. patent most?

F21K - Non-electric Light Sources Using LUMINESCENCE; Light Sources Using ELECTROCHEMILUMINESCENCE; Light Sources Using Charges OF Combustible MATERIAL; Light Sources Using Semiconductor Devices AS Light-generating ELEMENTS; Light Sources NOT Otherwise Provided FOR 2

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 2

F21V - Functional Features OR Details OF Lighting Devices OR Systems THEREOF; Structural Combinations OF Lighting Devices With Other Articles, NOT Otherwise Provided FOR 2

F21S - Non-portable Lighting DEVICES; Systems THEREOF; Vehicle Lighting Devices Specially Adapted FOR Vehicle Exteriors 1

A01G - HORTICULTURE; Cultivation OF Vegetables, Flowers, Rice, Fruit, Vines, Hops OR SEAWEED; FORESTRY; Watering 1

Top 5 of 5 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 Kaisen Photoelectricity Co., Ltd.'s patent record in context - here's where to go next.

Changzhou Kaisen Photoelectricity Co., Ltd.'s lead technology class is F21K (Non-electric Light Sources Using LUMINESCENCE; Light Sources Using ELECTROCHEMILUMINESCENCE; Light Sources Using Charges OF Combustible MATERIAL; Light Sources Using Semiconductor Devices AS Light-gen), 40% of its portfolio - see every assignee active in that class. Explore F21K
Ranked #45,599 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Changzhou Kaisen Photoelectricity Co., Ltd. against Chang YOW Technologies International Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 22.3/100 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.