USPTO 2015–2025 USPTO PatentsView US Corporation

Warren Engine Company, Inc

USPTO PatentsView assignee record - 7 granted patents across 14 technology areas, active 2016–2020. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: F02B (INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

11.6

Avg claims per patent

-83%

5-year filing velocity

The verdict

Warren holds 7 US patents across 14 technology areas, rank #38,291 of 50,000 tracked assignees.

#38,291
of 50,000 US assignees by volume: Top 77%
by Innovation Score (27.4/100): 11.6
avg claims per patent: -83%
filing velocity, last 5 yrs

Portfolio overview

Warren Engine Company, Inc has been granted 7 US utility patents between 2016 and 2020, placing Warren Engine Company, Inc at rank #38,291 across all assignees tracked by PlainPatent. This portfolio spans 14 distinct Cooperative Patent Classification (CPC) subclasses, averaging 11.6 claims per patent with primary concentration in F02B (INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL). As a US Corporation, Warren Engine Company, Inc is one of the more focused assignees in the PatentsView dataset. By volume, Warren sits between Walnut Technology Limited (7 patents, rank #38,287) and Waterstone, Llc (7 patents, rank #38,295) - the closest US assignees by grant volume. The composite Innovation Score of 27.4/100 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 6 in the 2015–2019 window, a -83% 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. Warren Engine Company, Inc's 11.6 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 14 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Warren Engine Company, Inc against peers pursuing similar technology classes.

Walnut Technology

7
Walsun Lighting (…

7
Warner Manufactur…

7
Warner Wireless I…

7
Warrior Rig

7
Waterbox OY

7
Waters Industries

7
Waterstone

7
Warren Engine ◀

7

What this shows Warren holds 7 patents at rank #38,291, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Warren

By rank, the assignees closest to #38,291 in granted patent volume.

Leaders in F02B (Internal-combustion Piston Engines)

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

Warren's Innovation Score vs. every tracked assignee

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

27 Top 77% higher than 23% 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

USPTO utility patent grants by year · 2016–2020

Grants by year

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

View data table

Warren Engine Company, Inc patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	1	14.3%
2017	2	28.6%
2018	1	14.3%
2019	2	28.6%
2020	1	14.3%

Which technologies does Warren Engine Company, Inc patent most?

F02B - INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL 7

F01B - MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES 4

F01L - CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES 2

F02P - IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES 2

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 1

Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION 1

F02G - HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS ; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR 1

F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES 1

H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 1

Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS 1

F24D - DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR 1

F01K - STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES 1

F02F - CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES 1

H01T - SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES 1

Top 14 of 14 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#38,291

Across all tracked assignees

Innovation Score

27.4 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does Warren Engine Company, Inc hold?

Warren Engine Company, Inc holds 7 US granted patents filed between 2016 and 2020, spanning 14 technology areas.

What is Warren Engine Company, Inc's Innovation Score?

Warren Engine Company, Inc has an Innovation Score of 27.4 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Warren Engine Company, Inc focus on?

Warren Engine Company, Inc's top technology area is F02B (INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL) with 7 patents. The company has filed patents in 14 CPC subclasses total.

Is Warren Engine Company, Inc's patent filing rate increasing or decreasing?

Warren Engine Company, Inc's recent filing velocity is -83% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for Warren Engine Company, Inc's patents?

Warren Engine Company, Inc's patents average 11.6 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Warren Engine Company, 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

Warren's 7 grants land it in the top 77% 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 - Warren ranks #38,291 of 50,000. Top 50 holders
Most of this portfolio concentrates in F02B - see who else leads that technology area. F02B 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.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

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 byPlainPatent Editorial, US Patent Intelligence Editorial Team · 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.