Where does Maruwa Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Maruwa Co., Ltd. ranks #29,381 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Maruwa Co., Ltd. hold?

Maruwa Co., Ltd. holds 9 US utility patents granted between 2019 and 2024, spanning 14 technology areas.

What is Maruwa Co., Ltd.'s Innovation Score?

Maruwa Co., Ltd. has an Innovation Score of 38.6 out of 100 (top 40% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Maruwa Co., Ltd. focus on?

Maruwa Co., Ltd.'s top technology area is H01L (Semiconductor Devices NOT Covered BY Class H10) with 3 patents, ranking #1,788 of 3,373 assignees active in that subclass. Grants appear in 14 CPC subclasses total.

Is Maruwa Co., Ltd.'s patent grant rate increasing or decreasing?

Maruwa Co., Ltd.'s recent grant velocity is +250% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Maruwa Co., Ltd.'s patents?

Maruwa Co., Ltd.'s patents average 6.8 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

How is the Maruwa Co., Ltd. patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Maruwa Co., Ltd.

USPTO PatentsView assignee record - 9 granted patents across 14 technology areas, recorded in grant years 2019–2024. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: H01L (Semiconductor Devices NOT Covered BY Class H10).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Maruwa ranks #29,381 of 49,997 tracked US assignees by granted-patent volume, with 9 patents across 14 technology areas.

#29,381
of 49,997 US assignees by volume: Top 40%
by Innovation Score (38.6/100): 6.8
avg claims per patent: +250%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R29381 · Foreign Corporation #29,381 · 9 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-MICRO 9 grants
MID-PACK #29,381/49,997
PHOTO-FINISH MANN+HUMMEL…
CPC-FOCUS H01L · 14 areas
INNOV-THIN 38.6/100
CLAIMS-SPARSE 6.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +250% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: MANN+HUMMEL Filtration Technology Group Inc. (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Maruwa’s 38.6 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 8.0 pts (21%) Velocity 13.3 pts (34%) Breadth 13.2 pts (34%) Claim depth 4.1 pts (11%)

Qualcomm Incorporated · highest

85
Maruwa · this assignee

39
3D Lighting… · lowest

7

What this shows Maruwa's Innovation Score is 38.6/100 (top 40% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Maruwa?

Each dot is one of Maruwa’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Maruwa’s own 6.8 claims/patent is at or below the 11.9 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

Maruwa vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where Maruwa's grants concentrate

Maruwa Co., Ltd. is a focused PatentsView assignee: 14 CPC subclasses with 33.3% of grants classified under H01L (Semiconductor Devices NOT Covered BY Class H10). Peak complete grant year is 2022 (4 grants) versus a trough of 1 in 2021. By volume, Maruwa sits between MANN+HUMMEL Filtration Technology Group Inc. and Matatakitoyo Tool Co., Ltd..

Maruwa's three-year grant acceleration

Maruwa Co., Ltd. shows 6 grants in 2022–2024 against only 3 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

MANN+Hummel Filtr…

9
Mapanything

9
Mapei S P A

9
Marel Meat Proces…

9
Maschinenfabrik N…

9
Mascot Internatio…

9
Mastercard Intern…

9
Matatakitoyo Tool

9
Maruwa ◀

9

What this shows Maruwa holds 9 patents at rank #29,344, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Maruwa

By rank, the assignees closest to #29,344 in granted patent volume.

Leaders in H01L (Semiconductor Devices NOT Covered BY Class H10)

Other assignees with the most granted patents in Maruwa's primary technology class.

Maruwa's Innovation Score vs. every tracked assignee

Composite of portfolio volume, grant velocity, technology breadth, and claim depth (0–100)

39 Top 40% higher than 60% of 49,997 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2019–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2019–2019 baseline. Full figures in the table below.

View data table

Maruwa Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2019	2	22.2%
2021	1	11.1%
2022	4	44.4%
2023	1	11.1%
2024	1	11.1%

Which technologies does Maruwa Co., Ltd. patent most?

H01L - Semiconductor Devices NOT Covered BY Class H10 3

C04B - Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone 3

C23C - Coating Metallic MATERIAL; Coating Material With Metallic MATERIAL; Surface Treatment OF Metallic Material BY Diffusion Into THE Surface, BY Chemical Conversion OR SUBSTITUTION; Coating BY Vacuum Evaporation, BY Sputtering, BY ION Implantation OR BY Chemical Vapour Deposition, IN General 2

G06F - Electric Digital Data Processing 2

F03G - Spring, Weight, Inertia OR Like MOTORS; Mechanical-power Producing Devices OR Mechanisms, NOT Otherwise Provided FOR OR Using Energy Sources NOT Otherwise Provided FOR 2

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 1

C01P - Indexing Scheme Relating TO Structural AND Physical Aspects OF Solid Inorganic Compounds 1

H01Q - Antennas, i.e. Radio Aerials 1

G03B - Apparatus OR Arrangements FOR Taking Photographs OR FOR Projecting OR Viewing THEM; Apparatus OR Arrangements Employing Analogous Techniques Using Waves Other Than Optical WAVES; Accessories Therefor 1

H01H - Electric SWITCHES; RELAYS; SELECTORS; Emergency Protective Devices 1

H02N - Electric Machines NOT Otherwise Provided FOR 1

H05B - Electric HEATING; Electric Light Sources NOT Otherwise Provided FOR; Circuit Arrangements FOR Electric Light Sources, IN General 1

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 1

H01J - Electric Discharge Tubes OR Discharge Lamps 1

Top 14 of 14 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Maruwa Co., Ltd.'s patent record in context - here's where to go next.

Maruwa Co., Ltd.'s lead technology class is H01L (Semiconductor Devices NOT Covered BY Class H10), 33.3% of its portfolio - see every assignee active in that class. Explore H01L
Ranked #29,381 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Maruwa Co., Ltd. against MANN+HUMMEL Filtration Technology Group Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 38.6/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

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

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled by PlainPatent , US Patent Intelligence Editorial Process · May 15, 2026

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. Data current as of May 2026.