Where does Qingdao Zhengtao Tool Co., Ltd rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Qingdao Zhengtao Tool Co., Ltd ranks #49,873 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 Qingdao Zhengtao Tool Co., Ltd hold?

Qingdao Zhengtao Tool Co., Ltd holds 5 US utility patents granted between 2018 and 2024, spanning 1 technology areas.

What is Qingdao Zhengtao Tool Co., Ltd's Innovation Score?

Qingdao Zhengtao Tool Co., Ltd has an Innovation Score of 14.2 out of 100 (3rd percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Qingdao Zhengtao Tool Co., Ltd focus on?

Qingdao Zhengtao Tool Co., Ltd's top technology area is B62B (Hand-propelled Vehicles, e.g. Hand Carts OR PERAMBULATORS; Sledges) with 2 patents, ranking #148 of 410 assignees active in that subclass. Grants appear in 1 CPC subclasses total.

Is Qingdao Zhengtao Tool Co., Ltd's patent grant rate increasing or decreasing?

Qingdao Zhengtao Tool Co., Ltd's recent grant velocity is -33% 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 Qingdao Zhengtao Tool Co., Ltd's patents?

Qingdao Zhengtao Tool Co., Ltd's patents average 3.8 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 Qingdao Zhengtao Tool 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 2015–2025 USPTO PatentsView Foreign Corporation

Qingdao Zhengtao Tool Co., Ltd

USPTO PatentsView assignee record - 5 granted patents across 1 technology areas, recorded in grant years 2018–2024. 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: B62B (Hand-propelled Vehicles, e.g. Hand Carts OR PERAMBULATORS; Sledges).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Qingdao ranks #49,873 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 1 technology areas.

#49,873
of 49,997 US assignees by volume: 3rd percentile
by Innovation Score (14.2/100): 3.8
avg claims per patent: -33%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R49873 · Foreign Corporation #49,873 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-LOW · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-MICRO 5 grants
BOTTOM-DECILE #49,873/49,997
PHOTO-FINISH Qingdao Haier…
CPC-NARROW B62B · 1 areas
INNOV-LOW 14.2/100
CLAIMS-SPARSE 3.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -33% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Qingdao Haier Innovation Technology 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 Qingdao’s 14.2 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 (44%) Velocity 2.2 pts (15%) Breadth 3.5 pts (25%) Claim depth 2.3 pts (16%)

Qualcomm Incorporated · highest

85
Qingdao Zhengtao Tool · this assignee

14
3D Lighting… · lowest

7

What this shows Qingdao's Innovation Score is 14.2/100 (3rd 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 Qingdao?

Each dot is one of Qingdao’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). Qingdao’s own 3.8 claims/patent is ABOVE the 1.0 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Qingdao's grants concentrate

Qingdao Zhengtao Tool Co., Ltd is a focused PatentsView assignee: 1 CPC subclasses with 40% of grants classified under B62B (Hand-propelled Vehicles, e.g. Hand Carts OR PERAMBULATORS; Sledges). Peak complete grant year is 2019 (2 grants) versus a trough of 1 in 2018. By volume, Qingdao sits between Qingdao Haier Innovation Technology Co., Ltd. and Qondado LLC.

Qingdao's three-year grant acceleration

Qingdao Zhengtao Tool Co., Ltd shows 1 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.

Qingdao Haier Inn…

5
Qingdao Lashbeaut…

5
Qingdao Sanyi Pla…

5
Qingdao Topscomm…

5
Qitele Group

5
QKM Technology (D…

5
Qoncept

5
Qondado

5
Qingdao Zhengtao… ◀

5

What this shows Qingdao holds 5 patents at rank #49,874, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Qingdao

By rank, the assignees closest to #49,874 in granted patent volume.

Leaders in B62B (Hand-propelled Vehicles)

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

Qingdao's Innovation Score vs. every tracked assignee

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

14 3rd percentile higher than 3% 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 · 2018–2024

Grants by year

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

View data table

Qingdao Zhengtao Tool Co., Ltd patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	1	20.0%
2019	2	40.0%
2020	1	20.0%
2024	1	20.0%

Which technologies does Qingdao Zhengtao Tool Co., Ltd patent most?

B62B - Hand-propelled Vehicles, e.g. Hand Carts OR PERAMBULATORS; Sledges 2

Top 1 of 1 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

Qingdao Zhengtao Tool Co., Ltd's patent record in context - here's where to go next.

Qingdao Zhengtao Tool Co., Ltd's lead technology class is B62B (Hand-propelled Vehicles, e.g. Hand Carts OR PERAMBULATORS; Sledges), 40% of its portfolio - see every assignee active in that class. Explore B62B
Ranked #49,873 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Qingdao Zhengtao Tool Co., Ltd against Qingdao Haier Innovation Technology Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 14.2/100 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.