PlainPatent
USPTO 2015–2025 USPTO PatentsView US Corporation

Stewart & Stevenson Llc

USPTO PatentsView assignee record - 22 granted patents across 22 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: E21B (EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS).

Explore the portfolio See the ranking
22
Total patents granted
22
CPC technology areas
15.7
Avg claims per patent
+350%
5-year filing velocity

The verdict

Stewart holds 22 US patents across 22 technology areas, rank #13,682 of 50,000 tracked assignees.

#13,682
of 50,000 US assignees by volume
Top 6%
by Innovation Score (56.8/100)
15.7
avg claims per patent
+350%
filing velocity, last 5 yrs

Portfolio overview

Stewart & Stevenson Llc has been granted 22 US utility patents between 2015 and 2025, placing Stewart & Stevenson Llc at rank #13,682 across all assignees tracked by PlainPatent. This portfolio spans 22 distinct Cooperative Patent Classification (CPC) subclasses, averaging 15.7 claims per patent with primary concentration in E21B (EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS). As a US Corporation, Stewart & Stevenson Llc is one of the more focused assignees in the PatentsView dataset. By volume, Stewart sits between SOKO Kagaku Co., Ltd. (22 patents, rank #13,678) and Studio XID Korea, Inc. (22 patents, rank #13,686) - the closest US assignees by grant volume. The composite Innovation Score of 56.8/100 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 18 grants, compared with 4 in the 2015–2019 window, a +350% shift in five-year velocity. An acceleration of this magnitude signals aggressive R&D investment and expanding technical ambition. 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. Stewart & Stevenson Llc's 15.7 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while a multi-domain presence across 22 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Stewart & Stevenson Llc against peers pursuing similar technology classes.

Who files at Stewart's volume?

Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀

patents

What this shows Stewart holds 22 patents at rank #13,682, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Source USPTO PatentsView, granted utility patents As of 2015–2025

Companies ranked near Stewart

By rank, the assignees closest to #13,682 in granted patent volume.

Leaders in E21B (Earth OR ROCK Drilling)

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

Stewart's Innovation Score vs. every tracked assignee

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

57 Top 6% higher than 94% of 50,000 US assignees

0–10: 687 US assignees (1%). Below this entry. 10–20: 2,527 US assignees (5%). Below this entry. 20–30: 13,162 US assignees (26%). Below this entry. 30–40: 15,294 US assignees (31%). Below this entry. 40–50: 11,491 US assignees (23%). Below this entry. 50–60: 5,058 US assignees (10%). This entry sits in this band. 60–70: 1,537 US assignees (3%). Above this entry. 70–80: 234 US assignees (0%). Above this entry. 80–90: 10 US assignees (0%). Above this entry. 90–100: 0 US assignees (0%). Above this entry. This assignee 0 100 every tracked assignee, bucketed by value

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

0246810 20152017202020212022202320242025 3
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
Stewart & Stevenson Llc patent grants by year, 2015–2025
Year Patents Granted Share of Period
2015 2 9.1%
2017 2 9.1%
2020 1 4.5%
2021 1 4.5%
2022 1 4.5%
2023 8 36.4%
2024 4 18.2%
2025 3 13.6%

Which technologies does Stewart & Stevenson Llc patent most?

Top 15 of 22 technology areas

Patent Moat Analysis

Portfolio Volume Light
Tech Breadth Multi-domain
Claim Depth Standard
Velocity Accelerating

Where it ranks

Overall rank by patents

#13,682

Across all tracked assignees

Innovation Score

56.8 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 Stewart & Stevenson Llc hold?
Stewart & Stevenson Llc holds 22 US granted patents filed between 2015 and 2025, spanning 22 technology areas.
What is Stewart & Stevenson Llc's Innovation Score?
Stewart & Stevenson Llc has an Innovation Score of 56.8 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does Stewart & Stevenson Llc focus on?
Stewart & Stevenson Llc's top technology area is E21B (EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS) with 13 patents. The company has filed patents in 22 CPC subclasses total.
Is Stewart & Stevenson Llc's patent filing rate increasing or decreasing?
Stewart & Stevenson Llc's recent filing velocity is +350% compared to the prior five-year period. This indicates accelerating innovation.
What does claim depth mean for Stewart & Stevenson Llc's patents?
Stewart & Stevenson Llc's patents average 15.7 claims each. This falls within the standard range, providing solid legal coverage.
How is the Stewart & Stevenson Llc 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

Stewart's 22 grants land it in the top 6% 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 - Stewart ranks #13,682 of 50,000. Top 50 holders
  • Most of this portfolio concentrates in E21B - see who else leads that technology area. E21B 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

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.