Where does National Coupling Company, Inc. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), National Coupling Company, Inc. ranks #12,133 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 National Coupling Company, Inc. hold?

National Coupling Company, Inc. holds 25 US utility patents granted between 2015 and 2024, spanning 9 technology areas.

What is National Coupling Company, Inc.'s Innovation Score?

National Coupling Company, Inc. has an Innovation Score of 36.1 out of 100 (top 47% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is National Coupling Company, Inc.'s patent grant rate increasing or decreasing?

National Coupling Company, Inc.'s recent grant velocity is +27% compared to the prior five-year period (grant years, not application filing dates). The company is maintaining or growing its granted-patent output.

What does claim depth mean for National Coupling Company, Inc.'s patents?

National Coupling Company, Inc.'s patents average 16.7 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 National Coupling 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.

USPTO 2015–2025 USPTO PatentsView US Corporation

National Coupling Company, Inc.

Q: What technology areas does National Coupling Company, Inc. focus on?

National Coupling Company, 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 15 patents, ranking #241 of 1,363 assignees active in that subclass. Grants appear in 9 CPC subclasses total.

USPTO PatentsView assignee record - 25 granted patents across 9 technology areas, recorded in grant years 2015–2024. 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, National ranks #12,133 of 49,997 tracked US assignees by granted-patent volume, with 25 patents across 9 technology areas.

#12,133
of 49,997 US assignees by volume: Top 47%
by Innovation Score (36.1/100): 16.7
avg claims per patent: +27%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R12133 · US Corporation #12,133 · 25 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-RICH · TYPE-USCORP · VEL-UP · BOOK-FULL

GRANTS-SMALL 25 grants
UPPER-Q #12,133/49,997
PHOTO-FINISH Naver Business…
CPC-NARROW E21B · 9 areas
INNOV-THIN 36.1/100
CLAIMS-RICH 16.7 claims/avg
TYPE-USCORP US Corporation
VEL-UP +27% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Naver Business Platform Corporation (±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 National’s 36.1 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 11.3 pts (31%) Velocity 4.2 pts (12%) Breadth 10.6 pts (29%) Claim depth 10.0 pts (28%)

Qualcomm Incorporated · highest

85
Agency Arms · near

36
Biokine Therapeutics · near

36
National Coupling · this assignee

36
Siva Power · near

36
Wing Hing Manufactur… · near

36
3D Lighting… · lowest

7

What this shows National's Innovation Score is 36.1/100 (top 47% 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 National?

Each dot is one of National’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). National’s own 16.7 claims/patent is ABOVE the 15.5 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

National vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where National's grants concentrate

National Coupling Company, Inc. is a focused PatentsView assignee: 9 CPC subclasses with 60% 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 2019 (4 grants) versus a trough of 1 in 2015. By volume, National sits between NKT HV Cables AB and Nora Lighting, Inc..

National's three-year grant acceleration

National Coupling Company, Inc. shows 7 grants in 2022–2024 against only 11 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.

NKT HV Cables AB

25
Norsk Hydro ASA

25
NP Medical

25
Nuevolution A/S

25
Naver Business Pl…

25
Nimbus Lakshmi

25
Nono

25
Nora Lighting

25
National Coupling ◀

25

What this shows National holds 25 patents at rank #12,137, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near National

By rank, the assignees closest to #12,137 in granted patent volume.

Leaders in E21B (Earth OR Rock Drilling)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for National, neither rank-band nor same-CPC leaders (those blocks stay above). In E21B (Earth OR Rock Drilling), National ranks #241 of 1,363 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (36 here).

Biokine Therapeutics Ltd. 36 Agency Arms, LLC 36 Siva Power, Inc. 36 Wing Hing Manufacturing Company Limited 36

National's Innovation Score vs. every tracked assignee

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

36 Top 47% higher than 53% 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 · 2015–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

National Coupling Company, Inc. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	4.0%
2016	3	12.0%
2017	2	8.0%
2018	1	4.0%
2019	4	16.0%
2020	4	16.0%
2021	3	12.0%
2022	2	8.0%
2023	1	4.0%
2024	4	16.0%

Which technologies does National Coupling Company, Inc. patent most?

E21B - Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells 15

F16K - VALVES; TAPS; COCKS; ACTUATING-FLOATS; Devices FOR Venting OR Aerating 13

F16L - PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General 12

F16J - Pistons ; CYLINDERS; Sealings 8

Y10T - Technical Subjects Covered BY Former US Classification 6

G05D - Systems FOR Controlling OR Regulating Non-electric Variables 3

F15B - Systems Acting BY Means OF Fluids IN GENERAL; Fluid-pressure Actuators, e.g. SERVOMOTORS; Details OF Fluid-pressure Systems, NOT Otherwise Provided FOR 2

G05B - Control OR Regulating Systems IN GENERAL; Functional Elements OF Such SYSTEMS; Monitoring OR Testing Arrangements FOR Such Systems OR Elements 2

G01F - Measuring Volume, Volume Flow, Mass Flow OR Liquid LEVEL; Metering BY Volume 1

Top 9 of 9 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

National Coupling Company, Inc.'s patent record in context - here's where to go next.

National Coupling Company, 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), 60% of its portfolio - see every assignee active in that class. Explore E21B
Ranked #12,133 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare National Coupling Company, Inc. against NKT HV Cables AB, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 36.1/100 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.