PlainPatent

CPC technology class · H05

H05F - Static Electricity

Static electricity; naturally-occurring electricity. 557 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

557
US patents granted
H05
Parent CPC class
20
Active assignees
-3%
5-yr velocity

The verdict

Static Electricity ranks #530 of 670 CPC technology areas - 557 US patents granted since 2015, with filing down 3% over five years.

#530
of 670 CPC technology areas
557
US patents granted, 2015–2025
Murata Manufacturing
leading assignee (22)
-3%
filing velocity, last 5 yrs
Top assignee: Murata Manufacturing Co., Ltd. (22 patents)

CPC subclass H05F - STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY - covers 557 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class H05 (ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR). See our CPC classification guide for how the system works.

The competitive landscape in H05F is shaped by 20 distinct companies actively filing in this space. Murata Manufacturing Co., Ltd. leads with 22 patents, followed by Moxtek, Inc. at 6 grants and Earth Energies, Inc. at 6.

Filing activity in H05F is down 3% over the past five years versus 2015-2019, a relatively steady filing pace. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is H05F innovation accelerating?

US utility-patent grants per year in H05F, 2015–2025 - recent five years are down 3% versus 2015–2019.

30354045505560 20152016201720182019202020212022202320242025 36

Who leads H05F?

The 12 most active assignees in STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY - wider bars mean more grants

patents

What this shows Murata Manufacturing is the most active filer in H05F, holding 22 of the 557 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

Source USPTO PatentsView, granted utility patents As of 2015–2025 grant years
View data table
Top patent holders in CPC subclass H05F
Rank Company Patents in H05F
#1 Newpark MATS & Integrated Services Llc 8
#2 Moxtek, Inc. 6
#3 Earth Energies, Inc. 6
#4 Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. 5
#5 Hermes Microvision Inc. 5
#6 Lightning Suppression Systems Co., Ltd. 5
#7 Woodway USA, Inc. 4
#8 Guill Tool & Engineering Co., Inc. 4
#9 Tigo Energy, Inc. 3
#10 Hexcel Composites Limited 3
#11 GEMA Switzerland Gmbh 3
#12 Titeflex Corporation 3
#13 Condalign AS 3
#14 Solaero Technologies Corp. 2
#15 Koganei Corporation 2
#16 Cutsforth, Inc. 2
#17 National University Corporation, Iwate University 2
#18 Advanced Ion Beam Technology, Inc. 2
#19 CMD Corporation 2
#20 Conductive Composites Company IP, Llc 2

About This Class

CPC subclass H05F belongs to class H05.

557 patents were granted in this class between 2015 and 2025.

20 companies actively patent in this space.

Classification System

Cooperative Patent Classification (CPC) is a hierarchical patent classification system used by the USPTO and EPO.

← All Technology Classes Technology Rankings →

Footprint here vs. claim strategy

Each dot is a leading H05F assignee, placed by how many patents it holds in this class (horizontal) against its company-wide average claims per patent (vertical) - a read on whether the class is led by broad-but-shallow filers or focused deep-claim players.

Top 14 H05F assignees by class footprint. Bubble size = patents in H05F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 H05F assignees by class footprint. Bubble size = patents in H05F. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 0246810 Patents in H05F Avg claims / patent (company-wide) Newpark Mats & Integr…MoxtekEarth EnergiesYantai Jereh Petroleu…Hermes MicrovisionLightning Suppression…Woodway UsaGuill Tool & Engineer…Tigo EnergyHexcel CompositesGema SwitzerlandTiteflexCondalign AsSolaero
Top 14 H05F assignees by class footprint. Bubble size = patents in H05F. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class H05F?
CPC subclass H05F covers STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY. It belongs to CPC class H05 (ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR), with 557 US utility patents granted since 2015.
How many patents have been filed in H05F?
557 US utility patents were granted in CPC subclass H05F between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in H05F?
Murata Manufacturing Co., Ltd. leads H05F with 22 patents, making it the most active assignee in this technology area.
How is patent data for H05F collected?
Patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office. It covers all US granted utility patents and assigns CPC codes based on the technology described in each patent.
What is the difference between CPC class and subclass?
A CPC class (e.g., H05) is a broad technology category. Subclasses like H05F provide finer granularity within that category. PlainPatent organizes data at the subclass level (4-character codes) for the most useful view of technology domains.

Read our methodology - how this data is sourced, computed, and verified.

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

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.