PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

SANKEN ELECTRIC CO., LTD.

USPTO PatentsView assignee record — 191 granted patents across 36 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H02M (APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER;).

Explore the portfolio See the ranking
191
Total patents granted
36
CPC technology areas
9.0
Avg claims per patent
-56%
5-year filing velocity

The verdict

SANKEN holds 191 US patents across 36 technology areas — rank #2,074 of 50,000 tracked assignees.

#2,074
of 50,000 US assignees by volume
Top 15%
by Innovation Score (49.0/100)
9.0
avg claims per patent
-56%
filing velocity, last 5 yrs

Portfolio overview

SANKEN ELECTRIC CO., LTD. has been granted 191 US utility patents between 2015 and 2025, placing SANKEN ELECTRIC CO., LTD. at rank #2,074 across all assignees tracked by PlainPatent. This portfolio spans 36 distinct Cooperative Patent Classification (CPC) subclasses, averaging 9.0 claims per patent with primary concentration in H02M (APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER;). As a Foreign Corporation, SANKEN ELECTRIC CO., LTD. is one of the more focused assignees in the PatentsView dataset. The composite Innovation Score of 49.0/100 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 58 grants, compared with 133 in the 2015–2019 window — a -56% 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. SANKEN ELECTRIC CO., LTD.'s 9.0 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 36 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark SANKEN ELECTRIC CO., LTD. against peers pursuing similar technology classes.

How does SANKEN compare?

Granted US patents 2015–2025 versus the largest corporate holders — this company marked ◀

patents

What this shows SANKEN holds 191 patents — placing it at rank #2,074 overall, well behind the volume leaders but ahead of the tens of thousands of smaller assignees in the dataset.

Source USPTO PatentsView — granted utility patents As of 2015–2025

SANKEN's Innovation Score vs. every tracked assignee

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

49 Top 15% higher than 85% of 50,000 US assignees

0–10: 687 US assignees (1%). Below this entry. 10–20: 2,527 US assignees (5%). Below this entry. 20–30: 13,162 US assignees (26%). Below this entry. 30–40: 15,294 US assignees (31%). Below this entry. 40–50: 11,491 US assignees (23%). This entry sits in this band. 50–60: 5,058 US assignees (10%). Above this entry. 60–70: 1,537 US assignees (3%). Above this entry. 70–80: 234 US assignees (0%). Above this entry. 80–90: 10 US assignees (0%). Above this entry. 90–100: 0 US assignees (0%). Above this entry. This assignee 0 100 every tracked assignee, bucketed by value

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

010203040 20152016201720182019202020212022202320242025 6
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
SANKEN ELECTRIC CO., LTD. patent grants by year, 2015–2025
Year Patents Granted Share of Period
2015 33 17.3%
2016 36 18.8%
2017 28 14.7%
2018 21 11.0%
2019 15 7.9%
2020 22 11.5%
2021 4 2.1%
2022 7 3.7%
2023 7 3.7%
2024 12 6.3%
2025 6 3.1%

Which technologies does SANKEN ELECTRIC CO., LTD. patent most?

Top 15 of 36 technology areas

Patent Moat Analysis

Portfolio Volume Moderate
Tech Breadth Multi-domain
Claim Depth Simple
Velocity Declining

Where it ranks

Overall rank by patents

#2,074

Across all tracked assignees

Innovation Score

49.0 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 SANKEN ELECTRIC CO., LTD. hold?
SANKEN ELECTRIC CO., LTD. holds 191 US granted patents filed between 2015 and 2025, spanning 36 technology areas.
What is SANKEN ELECTRIC CO., LTD.'s Innovation Score?
SANKEN ELECTRIC CO., LTD. has an Innovation Score of 49.0 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does SANKEN ELECTRIC CO., LTD. focus on?
SANKEN ELECTRIC CO., LTD.'s top technology area is H02M (APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF) with 80 patents. The company has filed patents in 36 CPC subclasses total.
Is SANKEN ELECTRIC CO., LTD.'s patent filing rate increasing or decreasing?
SANKEN ELECTRIC CO., LTD.'s recent filing velocity is -56% compared to the prior five-year period. Filing activity has slowed relative to earlier years.
What does claim depth mean for SANKEN ELECTRIC CO., LTD.'s patents?
SANKEN ELECTRIC CO., LTD.'s patents average 9.0 claims each. This is relatively simple claim structure, typical for focused inventions.
How is the SANKEN ELECTRIC 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.

Learn More

How Innovation Score Works

Understand the four dimensions behind the composite score
How to Read Patent Data

Plain-English guide to CPC codes, claims, and metrics
Patent Moat Analysis

How companies use patents as competitive barriers

Explore the patent dataset

H02M technology

SANKEN ELECTRIC CO., LTD.'s primary CPC class — all holders and yearly trends
Top 50 patent holders

See where SANKEN ELECTRIC CO., LTD. ranks among the largest US patent assignees
All technology classes

Browse every CPC technology area by patent activity
How the score works

The four dimensions behind the Innovation Score

Related

All companies → | All technologies → | Rankings →
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.

All federal data sources used on this page
  • USPTO PatentsView — official U.S. Patent and Trademark Office bulk patent data. patentsview.org
  • USPTO Patent Application Information Retrieval (PAIR) — application status and file history. uspto.gov/patents/pair
  • USPTO Bulk Data Storage System — comprehensive patent text + claims dataset. bulkdata.uspto.gov
  • USPTO CPC Classification — Cooperative Patent Classification scheme for technology categorization. uspto.gov/cpc
  • SEC EDGAR — public filings cross-reference for assignee corporate entity matching. sec.gov/edgar
  • WIPO PATENTSCOPE — international patent context (related international filings). wipo.int/patentscope