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 grant trajectory.

Compiled by PlainPatent · May 15, 2026

559
US patents granted: #5/5
in B63: 4.2%
B63 class share: +12%
5-yr velocity

The verdict

According to USPTO PatentsView, Auxiliaries On Vessels ranks #529 of 670 CPC technology areas - 559 US patents granted since 2015, with recorded grant volume up 12% over five years.

#529
of 670 CPC technology areas: 559
US patents granted, 2015–2025: Brunswick
leading assignee (35): +12%
grant velocity, last 5 yrs

How B63J's grant cadence moved

Between 2020–2024, B63J recorded 263 grants versus 235 in 2015–2019 (+12% equal-window velocity). Across complete years, output peaked in 2020 at 66 grants and bottomed in 2018 at 38 (+74% peak-over-trough). Lead assignee Brunswick Corporation holds 6.3% of the class ; the top three share 11.4%.

Leaderboard read

B63J concentration, lead at 6.3%

Brunswick Corporation leads this historical grant record at 6.3% of B63J - foreign corporation assignees hold 57% of class grants (139 of 245). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 6.3%
Top three share: 11.4%
Lead over #2: 17

Where B63J sits inside B63

Among 5 subclasses in B63 (Ships OR Other Waterborne VESSELS; Related Equipment), B63J ranks #5 and holds 4.2% of the parent class's 13,303 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

B63B 6,790 B63H 3,529 B63C 1,244 B63G 1,181

Rising assignees active in B63J

Company-wide grant multiples (2022–2024 vs 2019–2021) among assignees with ≥5 patents in this subclass. Growth is company-wide; class patent counts are subclass-specific.

#1 Wavetamer LLC 15x 0 → 15 company-wide · 5 in B63J
#2 ElectroSea, LLC 5.00x 1 → 5 company-wide · 5 in B63J
#3 Brunswick Corporation 1.32x 207 → 274 company-wide · 35 in B63J
#4 Evoqua Water Technologies LLC 1.24x 63 → 78 company-wide · 6 in B63J
#5 Transocean Sedco Forex Ventures Limited 1.00x 12 → 12 company-wide · 6 in B63J

B63J grants by year, peak 2020 (66)

US utility-patent grants per year in B63J, 2015–2025 - recent five years are up 12% versus 2015–2019.

Brunswick

35
Daewoo Shipbuilding &…

18
Garmin Switzerland

11
Torqeedo

9
Hyundai Heavy…

8
Liquid Robotics

8
Panasia

8
Evoqua Water

6
Transocean Sedco…

6
Korea Institute of…

5
Miura

5
Wavetamer

5

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.

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

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).

Classes near B63J's 559-grant footprint

Nationwide nearest neighbors for B63J (#529 of 670 by volume ; lead share 6.3%) - not the B63 parent-class siblings above.

Nearest by grant volume

B60M 559 B64B 560 H05F 557 B41N 568

Nearest by lead-assignee share

G10L 6.3% C21B 6.3% E04D 6.2% H04J 6.2%

Questions about B63J

Which company holds the most patents in B63J?

Brunswick Corporation leads B63J with 35 patents (6.3% of the subclass). By PatentsView assignee type, foreign corporations account for 57% of class grants.

Which B63J assignees grew fastest recently?

Among assignees with ≥5 grants in B63J, Wavetamer LLC shows the highest company-wide grant multiple (15x: 0 grants in 2019–2021 → 15 in 2022–2024) while holding 5 patents in this subclass. Growth is company-wide, not class-only.

How does B63J compare inside parent class B63?

Inside B63 (Ships OR Other Waterborne VESSELS; Related Equipment), B63J ranks #5 of 5 subclasses by grant volume and holds 4.2% of the parent class total. The largest sibling is B63B (6,790 grants).

What to do with this data

B63J in context - here's where to go next.

Brunswick Corporation leads B63J with 35 grants in this class. See full portfolio
B63J ranks #529 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class B63, the largest sibling subclass is B63B with 6,790 grants. Explore B63B

Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.

Methodology - B63J figures are USPTO PatentsView granted-utility totals for this subclass (559 grants in the tracked window).

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.