CPC technology class · B41

B41J - Typewriters

Typewriters; selective printing mechanisms, i.e. mechanisms printing otherwise than from a forme; correction of typographical errors. 26,654 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

Compiled by PlainPatent · May 15, 2026

26,654
US patents granted: #1/11
in B41: 69.8%
B41 class share: -18%
5-yr velocity

The verdict

According to USPTO PatentsView, Typewriters ranks #78 of 670 CPC technology areas - 26,654 US patents granted since 2015, with recorded grant volume down 18% over five years.

#78
of 670 CPC technology areas: 26,654
US patents granted, 2015–2025: Seiko Epson
leading assignee (5,146): -18%
grant velocity, last 5 yrs

How B41J's grant cadence moved

Between 2020–2024, B41J recorded 11,136 grants versus 13,580 in 2015–2019 (-18% equal-window velocity). Across complete years, output peaked in 2015 at 3,289 grants and bottomed in 2024 at 1,983 (+66% peak-over-trough). Lead assignee Seiko Epson Corporation holds 19.3% of the class ; the top three share 41.2%.

Leaderboard read

B41J concentration, lead at 19.3%

Seiko Epson Corporation leads this historical grant record at 19.3% of B41J - foreign corporation assignees hold 80% of class grants (19,575 of 24,322). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share: 19.3%
Top three share: 41.2%
Lead over #2: 2,013

Where B41J sits inside B41

Among 11 subclasses in B41 (PRINTING; Lining MACHINES; TYPEWRITERS; Stamps), B41J ranks #1 and holds 69.8% of the parent class's 38,209 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

B41M 6,377 B41F 2,980 B41P 756 B41N 568 B41C 534 B41K 197 B41L 113 B41D 18

Rising assignees active in B41J

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 Primera Technology, Inc. 11x 1 → 11 company-wide · 21 in B41J
#2 Kornit Digital Technologies Ltd. 11x 1 → 11 company-wide · 5 in B41J
#3 Fiery, LLC 9.00x 0 → 9 company-wide · 5 in B41J
#4 CreateMe Technologies Inc. 8.38x 8 → 67 company-wide · 11 in B41J
#5 Hymmen GmbH Maschinen- und Anlagenbau 7.00x 0 → 7 company-wide · 7 in B41J

B41J grants by year, peak 2015 (3,289)

US utility-patent grants per year in B41J, 2015–2025 - recent five years are down 18% versus 2015–2019.

Seiko Epson

5,146
Canon

3,133
Brother Kogyo

2,693
Hewlett-packard…

2,289
Ricoh

1,612
Xerox

781
Toshiba Tec

615
Kyocera Document…

553
Fujifilm

364
Konica Minolta

304
Memjet Technology

252
Mimaki Engineering

240

What this shows Seiko Epson is the most active filer in B41J, holding 5,146 of the 26,654 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 B41J
Rank	Company	Patents in B41J
#1	Seiko Epson Corporation	5,146
#2	Canon Kabushiki Kaisha	3,133
#3	Brother Kogyo Kabushiki Kaisha	2,693
#4	Hewlett-packard Development Company, L.P.	2,289
#5	Ricoh Company, Ltd.	1,612
#6	Xerox Corporation	781
#7	Toshiba TEC Kabushiki Kaisha	615
#8	Kyocera Document Solutions Inc.	553
#9	Fujifilm Corporation	364
#10	Konica Minolta, Inc.	304
#11	Memjet Technology Limited	252
#12	Mimaki Engineering Co., Ltd.	240
#13	Screen Holdings Co., Ltd.	191
#14	Casio Computer Co., Ltd.	178
#15	Riso Kagaku Corporation	176
#16	Funai Electric Co., Ltd.	174
#17	Kyocera Corporation	146
#18	Eastman Kodak Company	142
#19	Kateeva, Inc.	129
#20	Fuji Xerox Co., Ltd.	124

Footprint here vs. claim strategy

Each dot is a leading B41J 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 B41J assignees by class footprint. Bubble size = patents in B41J. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near B41J's 26,654-grant footprint

Nationwide nearest neighbors for B41J (#78 of 670 by volume ; lead share 19.3%) - not the B41 parent-class siblings above.

Nearest by grant volume

G03G 26,691 H02K 26,848 G08G 27,080 G06K 27,107

Nearest by lead-assignee share

B23H 19.7% A24C 20.7% B41C 17.4% D05C 17.2%

Questions about B41J

Which company holds the most patents in B41J?

Seiko Epson Corporation leads B41J with 5,146 patents (19.3% of the subclass). By PatentsView assignee type, foreign corporations account for 80% of class grants.

Which B41J assignees grew fastest recently?

Among assignees with ≥5 grants in B41J, Primera Technology, Inc. shows the highest company-wide grant multiple (11x: 1 grants in 2019–2021 → 11 in 2022–2024) while holding 21 patents in this subclass. Growth is company-wide, not class-only.

How does B41J compare inside parent class B41?

Inside B41 (PRINTING; Lining MACHINES; TYPEWRITERS; Stamps), B41J ranks #1 of 11 subclasses by grant volume and holds 69.8% of the parent class total. The largest sibling is B41M (6,377 grants).

What to do with this data

B41J in context - here's where to go next.

Seiko Epson Corporation leads B41J with 5,146 grants in this class. See full portfolio
B41J ranks #78 of 670 by grant volume among all tracked CPC technology areas. See the ranking
Inside parent class B41, the largest sibling subclass is B41M with 6,377 grants. Explore B41M

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

Methodology - B41J figures are USPTO PatentsView granted-utility totals for this subclass (26,654 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.