CPC technology class · F05
F05C - Indexing Scheme Relating To Materials
Indexing scheme relating to materials, material properties or material characteristics for machines, engines or pumps other than non-positive-displacement machines or engines. 683 US utility patents granted 2015–2025, with the leading assignees and year-by-year grant trajectory.
- 683
- US patents granted
- #3/3
- in F05
- 1.7%
- F05 class share
- -34%
- 5-yr velocity
The verdict
According to USPTO PatentsView, Indexing Scheme Relating To Materials ranks #506 of 670 CPC technology areas - 683 US patents granted since 2015, with recorded grant volume down 34% over five years.
- #506
- of 670 CPC technology areas
- 683
- US patents granted, 2015–2025
- Ford Global
- leading assignee (27)
- -34%
- grant velocity, last 5 yrs
How F05C's grant cadence moved
Between 2020–2024, F05C recorded 250 grants versus 378 in 2015–2019 (-34% equal-window velocity). Across complete years, output peaked in 2019 at 87 grants and bottomed in 2023 at 40 (+118% peak-over-trough). Lead assignee Tenneco GmbH holds 2.5% of the class ; the top three share 6.9%.
Leaderboard read
F05C concentration, lead at 2.5%
Tenneco GmbH leads this historical grant record at 2.5% of F05C - foreign corporation assignees hold 65% of class grants (122 of 187). Figures describe granted US utility patents in this CPC subclass, not current investment or legal strength.
- Leader's share
- 2.5%
- Top three share
- 6.9%
- Lead over #2
- 2
17 of 683 grants
of the class's recorded grants
more grants than Emerson Climate Technologies, Inc.
Where F05C sits inside F05
Among 3 subclasses in F05 (Indexing Schemes Relating TO Engines OR Pumps IN Various Subclasses OF Classes F01-f04), F05C ranks #3 and holds 1.7% of the parent class's 39,173 recorded grants. Sibling chips below are the other subclasses in the same parent class, not the nationwide volume/lead-share peers further down.
Rising assignees active in F05C
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 Abaco Drilling Technologies LLC 2.00x 5 → 10 company-wide · 6 in F05C
- #2 Hitachi Industrial Equipment Systems Co., Ltd. 1.37x 83 → 114 company-wide · 7 in F05C
- #3 Edwards Limited 1.29x 42 → 54 company-wide · 5 in F05C
- #4 Taiho Kogyo Co., Ltd. 0.58x 36 → 21 company-wide · 15 in F05C
- #5 Emerson Climate Technologies, Inc. 0.40x 155 → 62 company-wide · 15 in F05C
F05C grants by year, peak 2019 (87)
US utility-patent grants per year in F05C, 2015–2025 - recent five years are down 34% versus 2015–2019.
Who leads F05C?
The 12 most active assignees in Indexing Scheme Relating TO Materials, Material Properties OR Material Characteristics FOR Machines, Engines OR Pumps Other Than Non-positive-displacement Machines OR Engines - wider bars mean more grants
- Tenneco
Tenneco GmbH
17 patents
- Emerson Climate
Emerson Climate Technologies, Inc.
15 patents
- Taiho Kogyo
Taiho Kogyo Co., Ltd.
15 patents
- Federal-mogul
Federal-Mogul LLC
9 patents
- Hitachi Industrial…
Hitachi Industrial Equipment Systems Co., Ltd.
7 patents
- Abaco Drilling 6
Abaco Drilling Technologies LLC
6 patents
- Edwards 5
Edwards Limited
5 patents
- Fujitsu General 4
Fujitsu General Limited
4 patents
- Roper Pump 4
Roper Pump Company, LLC
4 patents
- Quantex Patents 4
Quantex Patents Limited
4 patents
- Achates Power 3
Achates Power, Inc.
3 patents
- Danfoss Power… 3
Danfoss Power Solutions GMBH & Co. OHG
3 patents
What this shows Ford Global is the most active filer in F05C, holding 27 of the 683 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.
View data table
| Rank | Company | Patents in F05C |
|---|---|---|
| #1 | Tenneco GmbH | 17 |
| #2 | Emerson Climate Technologies, Inc. | 15 |
| #3 | Taiho Kogyo Co., Ltd. | 15 |
| #4 | Federal-Mogul LLC | 9 |
| #5 | Hitachi Industrial Equipment Systems Co., Ltd. | 7 |
| #6 | Abaco Drilling Technologies LLC | 6 |
| #7 | Edwards Limited | 5 |
| #8 | Fujitsu General Limited | 4 |
| #9 | Roper Pump Company, LLC | 4 |
| #10 | Quantex Patents Limited | 4 |
| #11 | Achates Power, Inc. | 3 |
| #12 | Danfoss Power Solutions GMBH & Co. OHG | 3 |
| #13 | Blade Dynamics Limited | 3 |
| #14 | Nabtesco Automotive Corporation | 3 |
| #15 | Kaeser Kompressoren SE | 3 |
| #16 | Magna Powertrain BAD Homburg GMBH | 3 |
| #17 | Bleistahl-Produktions GmbH & Co KG | 3 |
| #18 | Reme Technologies, LLC | 3 |
| #19 | Yamada Manufacturing Co., Ltd. | 2 |
| #20 | Exergyn, Ltd. | 2 |
Footprint here vs. claim strategy
Each dot is a leading F05C 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.
Classes near F05C's 683-grant footprint
Nationwide nearest neighbors for F05C (#506 of 670 by volume ; lead share 4.0%) - not the F05 parent-class siblings above.
Questions about F05C
Which company holds the most patents in F05C?
Which F05C assignees grew fastest recently?
How does F05C compare inside parent class F05?
What to do with this data
F05C in context - here's where to go next.
- Tenneco GmbH leads F05C with 17 grants in this class. See full portfolio
- F05C ranks #506 of 670 by grant volume among all tracked CPC technology areas. See the ranking
- Inside parent class F05, the largest sibling subclass is F05D with 30,682 grants. Explore F05D
Figures reflect USPTO PatentsView grant data through 2026-05-15; pending applications not yet granted are not counted.
Methodology - F05C figures are USPTO PatentsView granted-utility totals for this subclass (683 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.