USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Hitachi High-tech Science Corporation

USPTO PatentsView assignee record - 210 granted patents across 30 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H01J (ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS).

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

Explore the portfolio See the ranking

210

Total patents granted

CPC technology areas

8.4

Avg claims per patent

-24%

5-year filing velocity

The verdict

Hitachi holds 210 US patents across 30 technology areas, rank #1,911 of 50,000 tracked assignees.

#1,911
of 50,000 US assignees by volume: Top 19%
by Innovation Score (47.1/100): 8.4
avg claims per patent: -24%
filing velocity, last 5 yrs

Portfolio overview

Hitachi High-tech Science Corporation has been granted 210 US utility patents between 2015 and 2025, placing Hitachi High-tech Science Corporation at rank #1,911 across all assignees tracked by PlainPatent. This portfolio spans 30 distinct Cooperative Patent Classification (CPC) subclasses, averaging 8.4 claims per patent with primary concentration in H01J (ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS). As a Foreign Corporation, Hitachi High-tech Science Corporation is one of the more focused assignees in the PatentsView dataset. By volume, Hitachi sits between Benteler Automobiltechnik Gmbh (210 patents, rank #1,907) and Opentv, Inc. (210 patents, rank #1,915) - the closest US assignees by grant volume. The composite Innovation Score of 47.1/100 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 91 grants, compared with 119 in the 2015–2019 window, a -24% 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 High-tech Science Corporation's 8.4 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 30 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Hitachi High-tech Science Corporation against peers pursuing similar technology classes.

Benteler Automobi…

210
Baylor College of…

210
CPS Technology Ho…

210
Dow Corning

210
Hitachi Energy

210
National Universi…

210
Okamura

210
Opentv

210
Hitachi High-tech… ◀

210

What this shows Hitachi holds 210 patents at rank #1,911, 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 #1,911 in granted patent volume.

Leaders in H01J (Electric Discharge Tubes OR Discharge Lamps)

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)

47 Top 19% higher than 81% 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 · 2015–2025

Grants by year

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

View data table

Hitachi High-tech Science Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	17	8.1%
2016	27	12.9%
2017	34	16.2%
2018	24	11.4%
2019	17	8.1%
2020	30	14.3%
2021	19	9.0%
2022	20	9.5%
2023	14	6.7%
2024	7	3.3%
2025	1	0.5%

Which technologies does Hitachi High-tech Science Corporation patent most?

H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS 121

G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 104

G01Q - SCANNING-PROBE TECHNIQUES OR APPARATUS; APPLICATIONS OF SCANNING-PROBE TECHNIQUES, e.g. SCANNING PROBE MICROSCOPY [SPM] 16

G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY 12

G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION 7

H05H - PLASMA TECHNIQUE ; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS 5

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 4

G21K - TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES 4

G06F - ELECTRIC DIGITAL DATA PROCESSING 4

G01B - MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS 3

G02B - OPTICAL ELEMENTS, SYSTEMS OR APPARATUS 3

B01L - CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE 3

H04N - PICTORIAL COMMUNICATION, e.g. TELEVISION 3

G06T - IMAGE DATA PROCESSING OR GENERATION, IN GENERAL 3

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 2

Top 15 of 30 technology areas

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#1,911

Across all tracked assignees

Innovation Score

47.1 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 High-tech Science Corporation hold?

Hitachi High-tech Science Corporation holds 210 US granted patents filed between 2015 and 2025, spanning 30 technology areas.

What is Hitachi High-tech Science Corporation's Innovation Score?

Hitachi High-tech Science Corporation has an Innovation Score of 47.1 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 High-tech Science Corporation focus on?

Hitachi High-tech Science Corporation's top technology area is H01J (ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS) with 121 patents. The company has filed patents in 30 CPC subclasses total.

Is Hitachi High-tech Science Corporation's patent filing rate increasing or decreasing?

Hitachi High-tech Science Corporation's recent filing velocity is -24% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for Hitachi High-tech Science Corporation's patents?

Hitachi High-tech Science Corporation's patents average 8.4 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Hitachi High-tech Science Corporation 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 210 grants land it in the top 19% 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 #1,911 of 50,000. Top 50 holders
Most of this portfolio concentrates in H01J - see who else leads that technology area. H01J 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.