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CPC technology class · F04

F04B - Positive-displacement Machines For Liquids

Positive-displacement machines for liquids; pumps. 11,585 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.

11,585
US patents granted
#2/4
in F04
32.9%
F04 class share
+17%
5-yr velocity

The verdict

According to USPTO PatentsView, Positive-displacement Machines For Liquids ranks #157 of 670 CPC technology areas - 11,585 US patents granted since 2015, with recorded grant volume up 17% over five years.

#157
of 670 CPC technology areas
11,585
US patents granted, 2015–2025
Robert Bosch
leading assignee (267)
+17%
grant velocity, last 5 yrs

How F04B's grant cadence moved

Between 2020–2024, F04B recorded 5,640 grants versus 4,822 in 2015–2019 (+17% equal-window velocity). Across complete years, output peaked in 2019 at 1,230 grants and bottomed in 2015 at 772 (+59% peak-over-trough). Lead assignee Deka Products Limited Parternship holds 1.8% of the class ; the top three share 4.6%.

Leaderboard read

F04B concentration, lead at 1.8%

Deka Products Limited Parternship leads this historical grant record at 1.8% of F04B - us corporation assignees hold 52% of class grants (3,514 of 6,731). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.

Leader's share
1.8%

205 of 11,585 grants

Top three share
4.6%

of the class's recorded grants

Lead over #2
19

more grants than Graco Minnesota Inc.

Where F04B sits inside F04

Among 4 subclasses in F04 (Positive - Displacement Machines FOR LIQUIDS; Pumps FOR Liquids OR Elastic Fluids), F04B ranks #2 and holds 32.9% of the parent class's 35,173 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.

F04D 16,174 F04C 6,508 F04F 906

Rising assignees active in F04B

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. #1 Copeland LP 47x 0 → 47 company-wide · 5 in F04B
  2. #2 GD Energy Products, LLC 16x 0 → 16 company-wide · 22 in F04B
  3. #3 SPM Oil & Gas Inc. 14x 4 → 55 company-wide · 50 in F04B
  4. #4 Masterflex, LLC 11x 0 → 11 company-wide · 5 in F04B
  5. #5 Frore Systems Inc. 9.75x 4 → 39 company-wide · 20 in F04B

F04B grants by year, peak 2019 (1,230)

US utility-patent grants per year in F04B, 2015–2025 - recent five years are up 17% versus 2015–2019.

6008001,0001,2001,400 20152016201720182019202020212022202320242025 825

Who leads F04B?

The 12 most active assignees in Positive-displacement Machines FOR LIQUIDS; Pumps - wider bars mean more grants

patents

What this shows Robert Bosch is the most active filer in F04B, holding 267 of the 11,585 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

Source USPTO PatentsView, granted utility patents As of 2015–2025 grant years
View data table
Top patent holders in CPC subclass F04B
Rank Company Patents in F04B
#1 Deka Products Limited Parternship 205
#2 Graco Minnesota Inc. 186
#3 Halliburton Energy Services, Inc. 142
#4 Kabushiki Kaisha Toyota Jidoshokki 140
#5 Microjet Technology Co., Ltd. 136
#6 Caterpillar Inc. 114
#7 Kerr Machine Co. 91
#8 Emerson Climate Technologies, Inc. 89
#9 BJ Energy Solutions, LLC 89
#10 Schlumberger Technology Corporation 82
#11 Eagle Industry Co., Ltd. 81
#12 U.S. Well Services, LLC 66
#13 Hanon Systems 64
#14 Sumitomo Heavy Industries, Ltd. 58
#15 Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. 58
#16 Hitachi Industrial Equipment Systems Co., Ltd. 53
#17 Atlas Copco Airpower, Naamloze Vennootschap 50
#18 Whirlpool S.A. 50
#19 SPM Oil & Gas Inc. 50
#20 Haier US Appliance Solutions, Inc. 46

Footprint here vs. claim strategy

Each dot is a leading F04B 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 F04B assignees by class footprint. Bubble size = patents in F04B. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 510152025 50100150200250 Patents in F04B Avg claims / patent (company-wide) Deka Products…Graco MinnesotaHalliburton Energy…Toyota JidoshokkiMicrojet TechnologyCaterpillarKerr MachineEmerson ClimateBj Energy SolutionsSchlumberger…Eagle IndustryU S Well ServicesHanon SystemsSumitomo Heavy…
Top 14 F04B assignees by class footprint. Bubble size = patents in F04B. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Classes near F04B's 11,585-grant footprint

Nationwide nearest neighbors for F04B (#157 of 670 by volume ; lead share 2.3%) - not the F04 parent-class siblings above.

Nearest by grant volume

B60T 11,759 H03H 11,825 B29D 11,216 C09J 11,139

Nearest by lead-assignee share

G01R 2.3% F28D 2.3% G01D 2.3% B22D 2.3%

Questions about F04B

Which company holds the most patents in F04B?
Robert Bosch GmbH leads F04B with 267 patents (1.8% of the subclass). By PatentsView assignee type, us corporations account for 52% of class grants.
Which F04B assignees grew fastest recently?
Among assignees with ≥5 grants in F04B, Copeland LP shows the highest company-wide grant multiple (47x: 0 grants in 2019–2021 → 47 in 2022–2024) while holding 5 patents in this subclass. Growth is company-wide, not class-only.
How does F04B compare inside parent class F04?
Inside F04 (Positive - Displacement Machines FOR LIQUIDS; Pumps FOR Liquids OR Elastic Fluids), F04B ranks #2 of 4 subclasses by grant volume and holds 32.9% of the parent class total. The largest sibling is F04D (16,174 grants).

What to do with this data

F04B in context - here's where to go next.

  • Deka Products Limited Parternship leads F04B with 205 grants in this class. See full portfolio
  • F04B ranks #157 of 670 by grant volume among all tracked CPC technology areas. See the ranking
  • Inside parent class F04, the largest sibling subclass is F04D with 16,174 grants. Explore F04D

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

Methodology - F04B figures are USPTO PatentsView granted-utility totals for this subclass (11,585 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.