CPC technology class · B64

B64D - Equipment For Fitting In Or To Aircraft

Equipment for fitting in or to aircraft; flight suits; parachutes; arrangement or mounting of power plants or propulsion transmissions in aircraft. 21,967 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

21,967
US patents granted: #1/6
in B64: 37.6%
B64 class share: +51%
5-yr velocity

The verdict

According to USPTO PatentsView, Equipment For Fitting In Or To Aircraft ranks #91 of 670 CPC technology areas - 21,967 US patents granted since 2015, with recorded grant volume up 51% over five years.

#91
of 670 CPC technology areas: 21,967
US patents granted, 2015–2025: The Boeing
leading assignee (2,280): +51%
grant velocity, last 5 yrs

How B64D's grant cadence moved

Between 2020–2024, B64D recorded 11,759 grants versus 7,774 in 2015–2019 (+51% equal-window velocity). Across complete years, output peaked in 2024 at 2,519 grants and bottomed in 2015 at 1,125 (+124% peak-over-trough). Lead assignee The Boeing Company holds 10.4% of the class ; the top three share 19.5%.

Leaderboard read

B64D concentration, lead at 10.4%

The Boeing Company leads this historical grant record at 10.4% of B64D - us corporation assignees hold 62% of class grants (11,202 of 18,075). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 10.4%
Top three share: 19.5%
Lead over #2: 1,185

Where B64D sits inside B64

Among 6 subclasses in B64 (AIRCRAFT; AVIATION; Cosmonautics), B64D ranks #1 and holds 37.6% of the parent class's 58,451 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

B64C 17,186 B64U 10,226 B64F 5,518 B64G 2,994 B64B 560

Rising assignees active in B64D

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 RTX Corporation 662x 0 → 662 company-wide · 113 in B64D
#2 Beta AIR LLC 61x 6 → 367 company-wide · 243 in B64D
#3 Archer Aviation Inc. 44x 0 → 44 company-wide · 71 in B64D
#4 Goodrich Lighting Systems GmbH & Co. KG 29x 0 → 29 company-wide · 39 in B64D
#5 Workhorse Group Inc. 26x 2 → 52 company-wide · 18 in B64D

B64D grants by year, peak 2024 (2,519)

US utility-patent grants per year in B64D, 2015–2025 - recent five years are up 51% versus 2015–2019.

The Boeing

2,280
Airbus Operations

1,095
Hamilton Sundstrand…

910
Airbus Operations Sas

776
B/E Aerospace

644
Honeywell Internationa…

612
Goodrich

558
Textron Innovations

539
Pratt & Whitney Canada

402
Rockwell Collins

332
Rolls-royce

313
Rohr

265

What this shows The Boeing is the most active filer in B64D, holding 2,280 of the 21,967 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 B64D
Rank	Company	Patents in B64D
#1	The Boeing Company	2,280
#2	Airbus Operations Limited	1,095
#3	Hamilton Sundstrand Corporation (HSC)	910
#4	Airbus Operations SAS	776
#5	B/E Aerospace, Inc.	644
#6	Honeywell International Inc.	612
#7	Goodrich Corporation	558
#8	Textron Innovations Inc.	539
#9	Pratt & Whitney Canada Corp.	402
#10	Rockwell Collins, Inc.	332
#11	Rolls-royce plc	313
#12	Rohr, Inc.	265
#13	United Technologies Corporation	255
#14	Safran Aircraft Engines	253
#15	Beta AIR LLC	243
#16	Airbus Helicopters	214
#17	GE Aviation Systems Limited	208
#18	Bell Helicopter Textron Inc.	204
#19	Sikorsky Aircraft Corporation	197
#20	Rosemount Aerospace Inc.	173

Footprint here vs. claim strategy

Each dot is a leading B64D 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 B64D assignees by class footprint. Bubble size = patents in B64D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near B64D's 21,967-grant footprint

Nationwide nearest neighbors for B64D (#91 of 670 by volume ; lead share 10.4%) - not the B64 parent-class siblings above.

Nearest by grant volume

G01B 22,043 G03B 21,728 H01F 21,711 G03F 21,670

Nearest by lead-assignee share

F02M 10.4% E03C 10.3% A47L 10.3% G07D 10.3%

Questions about B64D

Which company holds the most patents in B64D?

The Boeing Company leads B64D with 2,280 patents (10.4% of the subclass). By PatentsView assignee type, us corporations account for 62% of class grants.

Which B64D assignees grew fastest recently?

Among assignees with ≥5 grants in B64D, RTX Corporation shows the highest company-wide grant multiple (662x: 0 grants in 2019–2021 → 662 in 2022–2024) while holding 113 patents in this subclass. Growth is company-wide, not class-only.

How does B64D compare inside parent class B64?

Inside B64 (AIRCRAFT; AVIATION; Cosmonautics), B64D ranks #1 of 6 subclasses by grant volume and holds 37.6% of the parent class total. The largest sibling is B64C (17,186 grants).

What to do with this data

B64D in context - here's where to go next.

The Boeing Company leads B64D with 2,280 grants in this class. See full portfolio
B64D ranks #91 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class B64, the largest sibling subclass is B64C with 17,186 grants. Explore B64C

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

Methodology - B64D figures are USPTO PatentsView granted-utility totals for this subclass (21,967 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.