En-Fab Inc.
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).
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.
How En-fab’s 47.1 Innovation Score adds up
The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.
Innovation-score neighbourhood around En-fab
Lowest and highest poles plus nearest Innovation Score peers, not a full corpus board reprint.
- Qualcomm Incorporated · highest
Qualcomm Incorporated · highest
85 score
- En-Fab · this assignee
En-Fab · this assignee
47 score
- 3D Lighting… · lowest 7
3D Lighting… · lowest
7 score
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.
Does more volume mean deeper claims for En-fab?
Each dot is one of En-fab’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). En-fab’s own 19.5 claims/patent is ABOVE the 17.7 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.
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.
Who files at En-Fab's volume?
Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀
- Empower Annuity I…
Empower Annuity Insurance Company of America
6 patents
- Empower RF Systems
Empower RF Systems, Inc.
6 patents
- Empyrean Medical…
Empyrean Medical Systems, Inc.
6 patents
- En RX Chemical
En RX Chemical, Inc.
6 patents
- Enclear Therapies
EnClear Therapies, Inc.
6 patents
- Encoded Therapeut…
Encoded Therapeutics, Inc.
6 patents
- Endliss Technology
Endliss Technology, Inc.
6 patents
- Endo Operations
Endo Operations Limited
6 patents
- En-fab ◀
En-Fab Inc.
6 patents
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.
- Empower Annuity Insurance Company of America #40,067 · 6 patents
- Empower RF Systems, Inc. #40,068 · 6 patents
- Empyrean Medical Systems, Inc. #40,069 · 6 patents
- En RX Chemical, Inc. #40,070 · 6 patents
- EnClear Therapies, Inc. #40,072 · 6 patents
- Encoded Therapeutics, Inc. #40,073 · 6 patents
- Endliss Technology, Inc. #40,074 · 6 patents
- Endo Operations Limited #40,075 · 6 patents
Leaders in E21B (Earth OR Rock Drilling)
Other assignees with the most granted patents in En-Fab's primary technology class.
- Halliburton Energy Services, Inc. 6,516 in class
- Schlumberger Technology Corporation 3,244 in class
- Saudi Arabian OIL Company 3,064 in class
- Baker Hughes Holdings LLC 1,273 in class
- Baker Hughes, a GE company, LLC 1,107 in class
- Weatherford Technology Holdings, LLC 829 in class
- Baker Hughes Oilfield Operations LLC 598 in class
- Cameron International Corporation 514 in 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
Grants by year
Teal-shaded recent years (2020–present) versus the 2022–2019 baseline. Full figures in the table below.
View data table
| Year | Patents Granted | Share of Period |
|---|---|---|
| 2022 | 2 | 33.3% |
| 2024 | 4 | 66.7% |
Which technologies does En-Fab Inc. patent most?
Top 6 of 6 technology areas
Data Source
USPTO PatentsView, US granted patents 2015–2025
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.
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.