Overall rank by patents
#45,859
Across all tracked assignees
USPTO 2015–2025 USPTO PatentsView US Corporation
Clarke Industrial Engineering Inc.
USPTO PatentsView assignee record - 5 granted patents across 2 technology areas, active 2015–2020. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: F16K (VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING).
5
Total patents granted
2
CPC technology areas
16.8
Avg claims per patent
-75%
5-year filing velocity
The verdict
Clarke holds 5 US patents across 2 technology areas, rank #45,859 of 50,000 tracked assignees.
- #45,859
- of 50,000 US assignees by volume
- Top 92%
- by Innovation Score (21.3/100)
- 16.8
- avg claims per patent
- -75%
- filing velocity, last 5 yrs
Portfolio overview
Clarke Industrial Engineering Inc. has been granted 5 US utility patents between 2015 and 2020, placing Clarke Industrial Engineering Inc. at rank #45,859 across all assignees tracked by PlainPatent. This portfolio spans 2 distinct Cooperative Patent Classification (CPC) subclasses, averaging 16.8 claims per patent with primary concentration in F16K (VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING). As a US Corporation, Clarke Industrial Engineering Inc. is one of the more focused assignees in the PatentsView dataset. By volume, Clarke sits between Citizen Watch Company Of America, Inc. (5 patents, rank #45,855) and Cleanvolt Energy, Inc. (5 patents, rank #45,863) - the closest US assignees by grant volume. The composite Innovation Score of 21.3/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.
Filing cadence tells the strategic story. Between 2020 and 2025 the company received 1 grants, compared with 4 in the 2015–2019 window, a -75% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. The US Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.
Claim depth and technology breadth together indicate competitive posture. Clarke Industrial Engineering Inc.'s 16.8 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while specialization in 2 subclasses reflects a tightly scoped invention area. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Clarke Industrial Engineering Inc. against peers pursuing similar technology classes.
Who files at Clarke's volume?
Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀
- Citizen Watch of…
Citizen Watch Company of America, Inc.
5 patents
- Citrox Biosciences
Citrox Biosciences Limited
5 patents
- Civolution B V
Civolution B.V.
5 patents
- Clariant
Clariant S.A.
5 patents
- Clean Air Group
Clean Air Group, Inc.
5 patents
- Clean Energy Fuels
Clean Energy Fuels Corp.
5 patents
- Cleanng
CleanNG, LLC
5 patents
- Cleanvolt Energy
Cleanvolt Energy, Inc.
5 patents
- Clarke Industrial… ◀
Clarke Industrial Engineering Inc.
5 patents
What this shows Clarke holds 5 patents at rank #45,859, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.
Companies ranked near Clarke
By rank, the assignees closest to #45,859 in granted patent volume.
- Citizen Watch Company Of America, Inc. #45,855 · 5 patents
- Citrox Biosciences Limited #45,856 · 5 patents
- Civolution B.v. #45,857 · 5 patents
- Clariant S.a. #45,858 · 5 patents
- Clean Air Group, Inc. #45,860 · 5 patents
- Clean Energy Fuels Corp. #45,861 · 5 patents
- Cleanng, Llc #45,862 · 5 patents
- Cleanvolt Energy, Inc. #45,863 · 5 patents
Leaders in F16K (Valves)
Other assignees with the most granted patents in Clarke's primary technology class.
- Hamilton Sundstrand Corporation (hsc) 309 in class
- Fisher Controls International Llc 309 in class
- Fujikin Incorporated 153 in class
- Cameron International Corporation 136 in class
- Emerson Process Management Regulator Technologies, Inc. 129 in class
- Halliburton Energy Services, Inc. 123 in class
- Mueller International, Llc 110 in class
- Kohler Co. 103 in class
Clarke's Innovation Score vs. every tracked assignee
Composite of portfolio volume, filing velocity, technology breadth, and claim depth (0–100)
21 Top 92% higher than 8% of 50,000 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
Grants by year
Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.
View data table
| Year | Patents Granted | Share of Period |
|---|---|---|
| 2015 | 1 | 20.0% |
| 2017 | 2 | 40.0% |
| 2018 | 1 | 20.0% |
| 2020 | 1 | 20.0% |
Which technologies does Clarke Industrial Engineering Inc. patent most?
Top 2 of 2 technology areas
Patent Moat Analysis
Portfolio Volume Light
Tech Breadth Specialized
Claim Depth Standard
Velocity Declining
Frequently Asked Questions
How many patents does Clarke Industrial Engineering Inc. hold?
Clarke Industrial Engineering Inc. holds 5 US granted patents filed between 2015 and 2020, spanning 2 technology areas.
What is Clarke Industrial Engineering Inc.'s Innovation Score?
Clarke Industrial Engineering Inc. has an Innovation Score of 21.3 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does Clarke Industrial Engineering Inc. focus on?
Clarke Industrial Engineering Inc.'s top technology area is F16K (VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING) with 4 patents. The company has filed patents in 2 CPC subclasses total.
Is Clarke Industrial Engineering Inc.'s patent filing rate increasing or decreasing?
Clarke Industrial Engineering Inc.'s recent filing velocity is -75% compared to the prior five-year period. Filing activity has slowed relative to earlier years.
What does claim depth mean for Clarke Industrial Engineering Inc.'s patents?
Clarke Industrial Engineering Inc.'s patents average 16.8 claims each. This falls within the standard range, providing solid legal coverage.
How is the Clarke Industrial Engineering Inc. 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.
How to use this portfolio
Clarke's 5 grants land it in the top 92% by Innovation Score, but volume alone doesn't tell you where the strength sits.
- Read that count against the largest US assignees before treating it as dominance - Clarke ranks #45,859 of 50,000. Top 50 holders
- Most of this portfolio concentrates in F16K - see who else leads that technology area. F16K leaders
- Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works
Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.
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.