Where does En-Fab Inc. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), En-Fab Inc. ranks #40,018 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 En-Fab Inc. hold?

En-Fab Inc. holds 6 US utility patents granted between 2022 and 2024, spanning 6 technology areas.

What is En-Fab Inc.'s Innovation Score?

En-Fab Inc. has an Innovation Score of 47.1 out of 100 (top 19% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is En-Fab Inc.'s patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for En-Fab Inc..

What does claim depth mean for En-Fab Inc.'s patents?

En-Fab Inc.'s patents average 19.5 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 En-Fab 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.

USPTO 2015–2025 USPTO PatentsView US Corporation

En-Fab Inc.

Q: What technology areas does En-Fab Inc. focus on?

En-Fab Inc.'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 6 patents. Grants appear in 6 CPC subclasses total.

USPTO PatentsView assignee record - 6 granted patents across 6 technology areas, recorded in grant years 2022–2024. 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: E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, En-fab ranks #40,018 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 6 technology areas.

#40,018
of 49,997 US assignees by volume: Top 19%
by Innovation Score (47.1/100): 19.5
avg claims per patent

USPTO PatentsView assignee plate

Corpus R40018 · US Corporation #40,018 · 6 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-NARROW · INNOV-PAR · CLAIMS-RICH · TYPE-USCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 6 grants
LOWER-Q #40,018/49,997
PHOTO-FINISH Empower Annuity…
CPC-NARROW E21B · 6 areas
INNOV-PAR 47.1/100
CLAIMS-RICH 19.5 claims/avg
TYPE-USCORP US Corporation
SPAN-YRS 2022–2024 · 3y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Empower Annuity Insurance Company of America (±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
En-Fab · this assignee

47
3D Lighting… · lowest

7

What this shows En-fab's Innovation Score is 47.1/100 (top 19% 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 En-fab's grants concentrate

En-Fab Inc. is a focused PatentsView assignee: 6 CPC subclasses with 100% of grants classified under E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells). Peak complete grant year is 2024 (4 grants) versus a trough of 2 in 2022. By volume, En-fab sits between Empower Annuity Insurance Company of America and Endo Operations Limited.

En-fab's three-year grant acceleration

En-Fab Inc. shows 6 grants in 2022–2024 against only 0 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.

Empower Annuity I…

6
Empower RF Systems

6
Empyrean Medical…

6
En RX Chemical

6
Enclear Therapies

6
Encoded Therapeut…

6
Endliss Technology

6
Endo Operations

6
En-fab ◀

6

What this shows En-Fab holds 6 patents at rank #40,071, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near En-Fab

By rank, the assignees closest to #40,071 in granted patent volume.

Leaders in E21B (Earth OR Rock Drilling)

Other assignees with the most granted patents in En-Fab's primary technology class.

En-fab's Innovation Score vs. every tracked assignee

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

47 Top 19% higher than 81% 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 · 2022–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2022–2019 baseline. Full figures in the table below.

View data table

En-Fab Inc. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2022	2	33.3%
2024	4	66.7%

Which technologies does En-Fab Inc. patent most?

E21B - Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells 6

F22G - Superheating OF Steam 4

F22B - Methods OF Steam GENERATION; Steam Boilers 4

B01F - Mixing, e.g. Dissolving, Emulsifying OR Dispersing 2

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 2

G01F - Measuring Volume, Volume Flow, Mass Flow OR Liquid LEVEL; Metering BY Volume 2

Top 6 of 6 technology areas

Where it ranks

Overall rank by patents

#40,018

of 49,997 tracked assignees

Innovation Score

47.1 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

En-Fab Inc.'s patent record in context - here's where to go next.

En-Fab Inc.'s lead technology class is E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells), 100% of its portfolio - see every assignee active in that class. Explore E21B
Ranked #40,018 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare En-Fab Inc. against Empower Annuity Insurance Company of America, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 47.1/100 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.