CPC technology class · B63

B63H - Marine Propulsion Or Steering

Marine propulsion or steering. 3,529 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

3,529
US patents granted: #2/5
in B63: 26.5%
B63 class share: +14%
5-yr velocity

The verdict

According to USPTO PatentsView, Marine Propulsion Or Steering ranks #295 of 670 CPC technology areas - 3,529 US patents granted since 2015, with recorded grant volume up 14% over five years.

#295
of 670 CPC technology areas: 3,529
US patents granted, 2015–2025: Brunswick
leading assignee (510): +14%
grant velocity, last 5 yrs

How B63H's grant cadence moved

Between 2020–2024, B63H recorded 1,678 grants versus 1,466 in 2015–2019 (+14% equal-window velocity). Across complete years, output peaked in 2024 at 368 grants and bottomed in 2015 at 229 (+61% peak-over-trough). Lead assignee Brunswick Corporation holds 14.5% of the class ; the top three share 28.6%.

Leaderboard read

B63H concentration, lead at 14.5%

Brunswick Corporation leads this historical grant record at 14.5% of B63H - foreign corporation assignees hold 55% of class grants (1,253 of 2,283). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 14.5%
Top three share: 28.6%
Lead over #2: 109

Where B63H sits inside B63

Among 5 subclasses in B63 (Ships OR Other Waterborne VESSELS; Related Equipment), B63H ranks #2 and holds 26.5% 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 B63C 1,244 B63G 1,181 B63J 559

Rising assignees active in B63H

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 Kawasaki Motors, Ltd. 146x 0 → 146 company-wide · 7 in B63H
#2 Navico, Inc. 38x 0 → 38 company-wide · 15 in B63H
#3 Rondo Energy, Inc. 36x 0 → 36 company-wide · 41 in B63H
#4 Taiga Motors Inc. 19x 0 → 19 company-wide · 9 in B63H
#5 Sharrow Engineering LLC 16x 0 → 16 company-wide · 6 in B63H

B63H grants by year, peak 2024 (368)

US utility-patent grants per year in B63H, 2015–2025 - recent five years are up 14% versus 2015–2019.

Brunswick

510
Yamaha Hatsudoki

401
Suzuki Motor

97
Brp Us

43
Rondo Energy

41
Daewoo Shipbuilding &…

39
Yanmar Holdings

35
Navico Holding As

32
Marine Canada…

31
Torqeedo

27
Garmin Switzerland

26
Furuno Electric

24

What this shows Brunswick is the most active filer in B63H, holding 510 of the 3,529 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 B63H
Rank	Company	Patents in B63H
#1	Brunswick Corporation	510
#2	Yamaha Hatsudoki Kabushiki Kaisha	401
#3	Suzuki Motor Corporation	97
#4	BRP US Inc.	43
#5	Rondo Energy, Inc.	41
#6	Daewoo Shipbuilding & Marine Engineering Co., Ltd.	39
#7	Yanmar Holdings Co., Ltd.	35
#8	Navico Holding AS	32
#9	Marine Canada Acquisition Inc.	31
#10	Torqeedo GmbH	27
#11	Garmin Switzerland GmbH	26
#12	Furuno Electric Company Limited	24
#13	Liquid Robotics, Inc.	22
#14	Johnson Outdoors Inc.	20
#15	Volvo Penta Corporation	20
#16	GE Energy Power Conversion Technology Limited	18
#17	MasterCraft Boat Company, LLC	18
#18	Seven Marine, LLC	18
#19	Showa Corporation	17
#20	Kai Concepts, LLC	17

Footprint here vs. claim strategy

Each dot is a leading B63H 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 B63H assignees by class footprint. Bubble size = patents in B63H. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near B63H's 3,529-grant footprint

Nationwide nearest neighbors for B63H (#295 of 670 by volume ; lead share 14.5%) - not the B63 parent-class siblings above.

Nearest by grant volume

E01C 3,503 A47K 3,567 F02N 3,467 B25F 3,594

Nearest by lead-assignee share

H10D 14.3% B62J 14.6% F02C 14.7% F03D 14.2%

Questions about B63H

Which company holds the most patents in B63H?

Brunswick Corporation leads B63H with 510 patents (14.5% of the subclass). By PatentsView assignee type, foreign corporations account for 55% of class grants.

Which B63H assignees grew fastest recently?

Among assignees with ≥5 grants in B63H, Kawasaki Motors, Ltd. shows the highest company-wide grant multiple (146x: 0 grants in 2019–2021 → 146 in 2022–2024) while holding 7 patents in this subclass. Growth is company-wide, not class-only.

How does B63H compare inside parent class B63?

Inside B63 (Ships OR Other Waterborne VESSELS; Related Equipment), B63H ranks #2 of 5 subclasses by grant volume and holds 26.5% of the parent class total. The largest sibling is B63B (6,790 grants).

What to do with this data

B63H in context - here's where to go next.

Brunswick Corporation leads B63H with 510 grants in this class. See full portfolio
B63H ranks #295 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 - B63H figures are USPTO PatentsView granted-utility totals for this subclass (3,529 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.