USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Hitachi Chemical Company, Ltd.

USPTO PatentsView assignee record - 425 granted patents across 122 technology areas, active 2015–2022. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

425

Total patents granted

122

CPC technology areas

13.9

Avg claims per patent

-80%

5-year filing velocity

The verdict

Hitachi holds 425 US patents across 122 technology areas, rank #1,028 of 50,000 tracked assignees.

#1,028
of 50,000 US assignees by volume: Top 8%
by Innovation Score (54.3/100): 13.9
avg claims per patent: -80%
filing velocity, last 5 yrs

Portfolio overview

Hitachi Chemical Company, Ltd. has been granted 425 US utility patents between 2015 and 2022, placing Hitachi Chemical Company, Ltd. at rank #1,028 across all assignees tracked by PlainPatent. This portfolio spans 122 distinct Cooperative Patent Classification (CPC) subclasses, averaging 13.9 claims per patent with primary concentration in H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10). As a Foreign Corporation, Hitachi Chemical Company, Ltd. is one of the broader-portfolio assignees in the PatentsView dataset. By volume, Hitachi sits between Interdigital VC Holdings, Inc. (427 patents, rank #1,024) and SRI International (424 patents, rank #1,032) - the closest US assignees by grant volume. The composite Innovation Score of 54.3/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 72 grants, compared with 353 in the 2015–2019 window, a -80% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. Hitachi Chemical Company, Ltd.'s 13.9 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while a diversified footprint across 100+ CPC subclasses spreads risk across many technology fronts. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Hitachi Chemical Company, Ltd. against peers pursuing similar technology classes.

Interdigital VC H…

427
PGS Geophysical AS

427
University OF Sou…

427
Gracenote

426
NOK

425
Zoom Video Commun…

425
Hitachi Chemical ◀

425
IOWA State Univer…

424
SRI International

424

What this shows Hitachi holds 425 patents at rank #1,028, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Hitachi

By rank, the assignees closest to #1,028 in granted patent volume.

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

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

Hitachi's Innovation Score vs. every tracked assignee

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

54 Top 8% higher than 92% of 50,000 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 · 2015–2022

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Hitachi Chemical Company, Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	70	16.5%
2016	73	17.2%
2017	65	15.3%
2018	70	16.5%
2019	75	17.6%
2020	69	16.2%
2021	2	0.5%
2022	1	0.2%

Which technologies does Hitachi Chemical Company, Ltd. patent most?

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 120

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 81

H05K - PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 81

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 74

C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS 69

C08L - COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 66

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 56

C09J - ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES 52

C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE 49

B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 43

G03F - PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR; 41

C08J - WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H 40

C09D - COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR 40

H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 38

C09G - POLISHING COMPOSITIONS ; SKI WAXES 35

Top 15 of 122 technology areas

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Diversified

Claim Depth Standard

Velocity Declining

Where it ranks

Overall rank by patents

#1,028

Across all tracked assignees

Innovation Score

54.3 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does Hitachi Chemical Company, Ltd. hold?

Hitachi Chemical Company, Ltd. holds 425 US granted patents filed between 2015 and 2022, spanning 122 technology areas.

What is Hitachi Chemical Company, Ltd.'s Innovation Score?

Hitachi Chemical Company, Ltd. has an Innovation Score of 54.3 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Hitachi Chemical Company, Ltd. focus on?

Hitachi Chemical Company, Ltd.'s top technology area is H01L (SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10) with 120 patents. The company has filed patents in 122 CPC subclasses total.

Is Hitachi Chemical Company, Ltd.'s patent filing rate increasing or decreasing?

Hitachi Chemical Company, Ltd.'s recent filing velocity is -80% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for Hitachi Chemical Company, Ltd.'s patents?

Hitachi Chemical Company, Ltd.'s patents average 13.9 claims each. This falls within the standard range, providing solid legal coverage.

How is the Hitachi Chemical Company, 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.

How to use this portfolio

Hitachi's 425 grants land it in the top 8% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - Hitachi ranks #1,028 of 50,000. Top 50 holders
Most of this portfolio concentrates in H01L - see who else leads that technology area. H01L leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

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

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 byPlainPatent Editorial, US Patent Intelligence Editorial Team · 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.