Where does Hartwell Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Hartwell Corporation ranks #14,028 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 Hartwell Corporation hold?

Hartwell Corporation holds 21 US utility patents granted between 2015 and 2025, spanning 11 technology areas.

What is Hartwell Corporation's Innovation Score?

Hartwell Corporation has an Innovation Score of 39.3 out of 100 (top 38% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Hartwell Corporation's patent grant rate increasing or decreasing?

Hartwell Corporation's recent grant velocity is +86% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Hartwell Corporation's patents?

Hartwell Corporation's patents average 15.4 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 Hartwell Corporation 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 US Corporation

Hartwell Corporation

Q: What technology areas does Hartwell Corporation focus on?

Hartwell Corporation's top technology area is E05C (Bolts OR Fastening Devices FOR Wings, Specially FOR Doors OR Windows) with 15 patents. Grants appear in 11 CPC subclasses total.

USPTO PatentsView assignee record - 21 granted patents across 11 technology areas, recorded in grant years 2015–2025. 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: E05C (Bolts OR Fastening Devices FOR Wings, Specially FOR Doors OR Windows).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Hartwell ranks #14,028 of 49,997 tracked US assignees by granted-patent volume, with 21 patents across 11 technology areas.

#14,028
of 49,997 US assignees by volume: Top 38%
by Innovation Score (39.3/100): 15.4
avg claims per patent: +86%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R14028 · US Corporation #14,028 · 21 grants

GRANTS-SMALL · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-RICH · TYPE-USCORP · VEL-SURGE · BOOK-FULL

GRANTS-SMALL 21 grants
MID-PACK #14,028/49,997
PHOTO-FINISH Hangzhou United Tools
CPC-FOCUS E05C · 11 areas
INNOV-THIN 39.3/100
CLAIMS-RICH 15.4 claims/avg
TYPE-USCORP US Corporation
VEL-SURGE +86% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Hangzhou United Tools 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.

Qualcomm Incorporated · highest

85
Hartwell · this assignee

39
3D Lighting… · lowest

7

What this shows Hartwell's Innovation Score is 39.3/100 (top 38% 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 Hartwell's grants concentrate

Hartwell Corporation is a focused PatentsView assignee: 11 CPC subclasses with 71.4% of grants classified under E05C (Bolts OR Fastening Devices FOR Wings, Specially FOR Doors OR Windows). Peak complete grant year is 2022 (5 grants) versus a trough of 1 in 2016. By volume, Hartwell sits between Home Control Singapore PTE Ltd and Hiab AB.

Hartwell's three-year grant acceleration

Hartwell Corporation shows 8 grants in 2022–2024 against only 7 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.

Home Control Sing…

21
Huizhou Kimree Te…

21
Hangzhou United T…

21
Hanshow Technology

21
Heerema Marine Co…

21
Heritage Research…

21
Hi-max Innovation

21
Hiab AB

21
Hartwell ◀

21

What this shows Hartwell holds 21 patents at rank #14,035, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Hartwell

By rank, the assignees closest to #14,035 in granted patent volume.

Leaders in E05C (Bolts OR Fastening Devices FOR Wings)

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

Hartwell's Innovation Score vs. every tracked assignee

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

39 Top 38% higher than 62% 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 · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Hartwell Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	9.5%
2016	1	4.8%
2017	2	9.5%
2019	2	9.5%
2020	2	9.5%
2021	3	14.3%
2022	5	23.8%
2023	1	4.8%
2024	2	9.5%
2025partial year	1	4.8%

Which technologies does Hartwell Corporation patent most?

E05C - Bolts OR Fastening Devices FOR Wings, Specially FOR Doors OR Windows 15

B64D - Equipment FOR Fitting IN OR TO AIRCRAFT; Flight SUITS; PARACHUTES; Arrangement OR Mounting OF Power Plants OR Propulsion Transmissions IN Aircraft 14

E05B - LOCKS; Accessories THEREFOR; Handcuffs 12

E05Y - Indexing Scheme Associated With Subclasses E05d AND E05f, Relating TO Construction Elements, Electric Control, Power Supply, Power Signal OR Transmission, User Interfaces, Mounting OR Coupling, Details, Accessories, Auxiliary Operations NOT Otherwise Provided FOR, Application Thereof 6

Y10T - Technical Subjects Covered BY Former US Classification 5

E05D - Hinges OR Suspension Devices FOR Doors, Windows OR Wings 4

E05F - Devices FOR Moving Wings Into Open OR Closed POSITION; Checks FOR WINGS; Wing Fittings NOT Otherwise Provided FOR, Concerned With THE Functioning OF THE Wing 3

Y10S - Technical Subjects Covered BY Former Uspc Cross-reference ART Collections [XRACs] AND Digests 3

B64C - AEROPLANES; Helicopters 2

F16F - SPRINGS; SHOCK-ABSORBERS; Means FOR Damping Vibration 1

F16B - Devices FOR Fastening OR Securing Constructional Elements OR Machine Parts Together, e.g. Nails, Bolts, Circlips, Clamps, Clips OR WEDGES; Joints OR Jointing 1

Top 11 of 11 technology areas

Where it ranks

Overall rank by patents

#14,028

of 49,997 tracked assignees

Innovation Score

39.3 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

Hartwell Corporation's patent record in context - here's where to go next.

Hartwell Corporation's lead technology class is E05C (Bolts OR Fastening Devices FOR Wings, Specially FOR Doors OR Windows), 71.4% of its portfolio - see every assignee active in that class. Explore E05C
Ranked #14,028 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Hartwell Corporation against Home Control Singapore PTE Ltd, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 39.3/100 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.