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 filing trajectory.

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

21,967
US patents granted: B64
Parent CPC class: 20
Active assignees: +75%
5-yr velocity

The verdict

Equipment FOR Fitting IN OR TO Aircraft ranks #91 of 670 CPC technology areas - 21,967 US patents granted since 2015, with filing up 75% over five years.

#91
of 670 CPC technology areas: 21,967
US patents granted, 2015–2025: The Boeing
leading assignee (2,280): +75%
filing velocity, last 5 yrs

Top assignee: The Boeing Company (2,280 patents)

CPC subclass B64D - EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - covers 21,967 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class B64 (AIRCRAFT; AVIATION; COSMONAUTICS). See our CPC classification guide for how the system works.

The competitive landscape in B64D is shaped by 20 distinct companies actively filing in this space. The Boeing Company leads with 2,280 patents, followed by Airbus Operations Limited at 1,095 grants and Hamilton Sundstrand Corporation (hsc) at 910.

Filing activity in B64D is up 75% 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 B64D innovation accelerating?

US utility-patent grants per year in B64D, 2015–2025 - recent five years are up 75% versus 2015–2019.

The Boeing

2,280
Airbus Operations

1,095
Hamilton Sundstrand (…

910
Airbus Operations Sas

776
B/E Aerospace

644
Honeywell Internation…

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

About This Class

CPC subclass B64D belongs to class B64.

21,967 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 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).

Frequently Asked Questions

What is CPC class B64D?

CPC subclass B64D covers EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT. It belongs to CPC class B64 (AIRCRAFT; AVIATION; COSMONAUTICS), with 21,967 US utility patents granted since 2015.

How many patents have been filed in B64D?

21,967 US utility patents were granted in CPC subclass B64D between 2015 and 2025, based on USPTO PatentsView data.

Which company holds the most patents in B64D?

The Boeing Company leads B64D with 2,280 patents, making it the most active assignee in this technology area.

How is patent data for B64D 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., B64) is a broad technology category. Subclasses like B64D 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.