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CPC technology class · B63

B63J - Auxiliaries ON Vessels

Auxiliaries on vessels. 559 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

559
US patents granted
B63
Parent CPC class
20
Active assignees
+29%
5-yr velocity

The verdict

Auxiliaries ON Vessels ranks #528 of 670 CPC technology areas - 559 US patents granted since 2015, with filing up 29% over five years.

#528
of 670 CPC technology areas
559
US patents granted, 2015–2025
Brunswick
leading assignee (35)
+29%
filing velocity, last 5 yrs
Top assignee: Brunswick Corporation (35 patents)

CPC subclass B63J - AUXILIARIES ON VESSELS - covers 559 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class B63 (SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT). See our CPC classification guide for how the system works.

The competitive landscape in B63J is shaped by 20 distinct companies actively filing in this space. Brunswick Corporation leads with 35 patents, followed by Daewoo Shipbuilding & Marine Engineering Co., Ltd. at 18 grants and Garmin Switzerland Gmbh at 11.

Filing activity in B63J is up 29% over the past five years versus 2015-2019, a sharp acceleration suggesting an emerging or fast-moving technology area. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is B63J innovation accelerating?

US utility-patent grants per year in B63J, 2015–2025 - recent five years are up 29% versus 2015–2019.

3040506070 20152016201720182019202020212022202320242025 40

Who leads B63J?

The 12 most active assignees in AUXILIARIES ON VESSELS - wider bars mean more grants

patents

What this shows Brunswick is the most active filer in B63J, holding 35 of the 559 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 B63J
Rank Company Patents in B63J
#1 Brunswick Corporation 35
#2 Daewoo Shipbuilding & Marine Engineering Co., Ltd. 18
#3 Garmin Switzerland Gmbh 11
#4 Torqeedo Gmbh 9
#5 Hyundai Heavy Industries Co., Ltd. 8
#6 Liquid Robotics, Inc. 8
#7 Panasia Co., Ltd. 8
#8 Evoqua Water Technologies Llc 6
#9 Transocean Sedco Forex Ventures Limited 6
#10 Korea Institute Of Ocean Science & Technology 5
#11 Miura Co., Ltd. 5
#12 Wavetamer Llc 5
#13 Enovation Controls, Llc 5
#14 Naiad Maritime Group, Inc. 5
#15 Electrosea, Llc 5
#16 ABB Oy 4
#17 Single Buoy Moorings Inc. 4
#18 Samsung Heavy IND. Co., Ltd. 4
#19 Volvo Penta Corporation 4
#20 Speclipse, Inc. 4

About This Class

CPC subclass B63J belongs to class B63.

559 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 B63J 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 B63J assignees by class footprint. Bubble size = patents in B63J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 B63J assignees by class footprint. Bubble size = patents in B63J. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 010203040 Patents in B63J Avg claims / patent (company-wide) BrunswickDaewoo Shipbuilding &…Garmin SwitzerlandTorqeedoHyundai Heavy Industr…Liquid RoboticsPanasiaEvoqua WaterTransocean Sedco Fore…Korea Institute of Oc…MiuraWavetamerEnovation ControlsNaiad Maritime Group
Top 14 B63J assignees by class footprint. Bubble size = patents in B63J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class B63J?
CPC subclass B63J covers AUXILIARIES ON VESSELS. It belongs to CPC class B63 (SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT), with 559 US utility patents granted since 2015.
How many patents have been filed in B63J?
559 US utility patents were granted in CPC subclass B63J between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B63J?
Brunswick Corporation leads B63J with 35 patents, making it the most active assignee in this technology area.
How is patent data for B63J 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., B63) is a broad technology category. Subclasses like B63J 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.