CPC technology class · A21

A21B - Bakers' Ovens

Bakers' ovens; machines or equipment for baking. 546 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

546
US patents granted: #3/3
in A21: 25.8%
A21 class share: +3%
5-yr velocity

The verdict

According to USPTO PatentsView, Bakers' Ovens ranks #531 of 670 CPC technology areas - 546 US patents granted since 2015, with recorded grant volume up 3% over five years.

#531
of 670 CPC technology areas: 546
US patents granted, 2015–2025: Samsung
leading assignee (19): +3%
grant velocity, last 5 yrs

How A21B's grant cadence moved

Between 2020–2024, A21B recorded 251 grants versus 243 in 2015–2019 (+3% equal-window velocity). Across complete years, output peaked in 2022 at 58 grants and bottomed in 2015 at 43 (+35% peak-over-trough). Lead assignee THE Middleby Corporation holds 3.3% of the class ; the top three share 8.6%.

Leaderboard read

A21B concentration, lead at 3.3%

THE Middleby Corporation leads this historical grant record at 3.3% of A21B - us corporation assignees hold 60% of class grants (152 of 255). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 3.3%
Top three share: 8.6%
Lead over #2: 3

Where A21B sits inside A21

Among 3 subclasses in A21 (BAKING; Edible Doughs), A21B ranks #3 and holds 25.8% of the parent class's 2,120 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

A21D 993 A21C 581

Rising assignees active in A21B

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 TPS IP, LLC 4.50x 2 → 9 company-wide · 8 in A21B
#2 Automation Tech, LLC 4.00x 0 → 4 company-wide · 5 in A21B
#3 Duke Manufacturing Co. 2.50x 4 → 10 company-wide · 8 in A21B
#4 Food Machinery Engineering, Lmtd 2.50x 2 → 5 company-wide · 6 in A21B
#5 Electrolux Professional, Inc. 1.89x 9 → 17 company-wide · 6 in A21B

A21B grants by year, peak 2022 (58)

US utility-patent grants per year in A21B, 2015–2025 - recent five years are up 3% versus 2015–2019.

The Middleby

18
Alto-shaam

15
Inventio

14
Duke Manufacturing

8
Tps Ip

8
Electrolux Home…

7
Tsann Kuen (Zhangzhou)…

7
Electrolux Professiona…

6
Haas Food Equipment

6
Unitherm Food Systems

6
Food Machinery…

6
R Weiss Verpackungstec…

6

What this shows Samsung is the most active filer in A21B, holding 19 of the 546 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 A21B
Rank	Company	Patents in A21B
#1	THE Middleby Corporation	18
#2	Alto-Shaam, Inc.	15
#3	Inventio AG	14
#4	Duke Manufacturing Co.	8
#5	TPS IP, LLC	8
#6	Electrolux Home Products, Inc.	7
#7	Tsann Kuen (Zhangzhou) Enterprise Co., Ltd.	7
#8	Electrolux Professional, Inc.	6
#9	Haas Food Equipment GMBH	6
#10	Unitherm Food Systems, LLC	6
#11	Food Machinery Engineering, Lmtd	6
#12	R. Weiss Verpackungstechnik GmbH & Co. KG	6
#13	Revent International AB	6
#14	A. J. Antunes & Co.	5
#15	AMF Automation Technologies, LLC	5
#16	Ten Wing Scientific Co., Ltd.	5
#17	Automation Tech, LLC	5
#18	Mecatherm	5
#19	Prince Castle LLC	4
#20	Marmon Foodservice Technologies, Inc.	4

Footprint here vs. claim strategy

Each dot is a leading A21B 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 A21B assignees by class footprint. Bubble size = patents in A21B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near A21B's 546-grant footprint

Nationwide nearest neighbors for A21B (#531 of 670 by volume ; lead share 3.5%) - not the A21 parent-class siblings above.

Nearest by grant volume

D05C 545 A46D 538 A63J 535 H05F 557

Nearest by lead-assignee share

C22B 3.5% A47F 3.5% A23G 3.5% H02J 3.5%

Questions about A21B

Which company holds the most patents in A21B?

Samsung Electronics Co., Ltd. leads A21B with 19 patents (3.3% of the subclass). By PatentsView assignee type, us corporations account for 60% of class grants.

Which A21B assignees grew fastest recently?

Among assignees with ≥5 grants in A21B, TPS IP, LLC shows the highest company-wide grant multiple (4.50x: 2 grants in 2019–2021 → 9 in 2022–2024) while holding 8 patents in this subclass. Growth is company-wide, not class-only.

How does A21B compare inside parent class A21?

Inside A21 (BAKING; Edible Doughs), A21B ranks #3 of 3 subclasses by grant volume and holds 25.8% of the parent class total. The largest sibling is A21D (993 grants).

What to do with this data

A21B in context - here's where to go next.

THE Middleby Corporation leads A21B with 18 grants in this class. See full portfolio
A21B ranks #531 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class A21, the largest sibling subclass is A21D with 993 grants. Explore A21D

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

Methodology - A21B figures are USPTO PatentsView granted-utility totals for this subclass (546 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.